Exhibit_B_-_VMB_Final_Traffic_Noise_Technical_Memorandum_1.17.20_updated_7.1.2021.pdf

TRAFFIC NOISE TECHNICAL MEMORANDUM

Veterans Memorial Boulevard

From Old US 41 to Livingston Road Collier County, Florida

Collier County Project # 60198

Prepared For:

Collier County Transportation Engineering Division

Prepared By:

January 17, 2020 Updated

July 1, 2021

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 i January 2020 / updated July 2021

EXECUTIVE SUMMARY

The objectives of this noise study are to identify noise sensitive sites adjacent to the Veterans Memorial Boulevard project corridor, compare and evaluate the traffic noise levels at these sites with and without the project, and evaluate noise abatement measures where warranted.

Additional objectives include the evaluation of construction noise and the estimation of future noise level contours adjacent to the project corridor. This information will assist local officials in the development of setback requirements for future noise sensitive land uses.

This study was prepared in accordance with 23 CFR, Part 772, Procedures for Abatement of Highway Traffic Noise and Construction Noise (July 13, 2010). The evaluation uses methodology established by the Florida Department of Transportation (FDOT) and documented in the PD&E Manual, Part 2, Chapter 18 (January 14, 2019), Highway Traffic Noise.

The TNM noise prediction model was used to predict traffic noise levels at 124 noise sensitive sites adjacent to the proposed alignment of Veterans Memorial Boulevard for the existing (2019) and future year (2040) conditions with and without the proposed extension. The assigned existing ambient noise levels range from 40.8 dB(A) to 57.0 dB(A) for Noise Abatement Criteria (NAC) Activity Category B (residential) and 48.5 dB(A) to 49.8 dB(A) for Activity Category C (recreational). The proposed build alternative is predicted to result in traffic noise levels ranging from 49.8 dB(A) to 66.3 dB(A) for NAC Activity Category B (residential) and 63.4 dB(A) to 64.1 dB(A) for Activity Category C (recreational). Of the 124 noise sensitive sites evaluated, nine (9) residences are predicted to experience future noise levels that approach the NAC for Activity Category B [66 dB(A) or more], and 46 residences are predicted to experience future noise levels that exceed the substantial increase [15 dB(A) or more] with the proposed extension and widening of Veterans Memorial Boulevard.

Noise abatement measures were evaluated for the 55 noise sensitive sites that are predicted to experience future noise levels that either approach the NAC and/or experience a substantial increase as a result of the proposed extension of Veterans Memorial Boulevard. It was determined that traffic system management techniques, alignment modifications and property acquisition are not reasonable abatement measures. Land use controls were identified as a feasible abatement measure that could be used in the future by local officials to minimize the permitting and construction of incompatible land uses along the Veterans Memorial Boulevard corridor.

Additionally, noise barriers located along the proposed right-of-way line were evaluated in TNM for heights ranging from 8 feet to 22 feet in 2-foot increments. For a particular height, the length of a barrier was optimized to minimize cost while trying to maintain the required 5 dB(A) reduction at two or more impacted noise sensitive sites and a 7 dB(A) reduction at one benefited noise sensitive site.

As outlined in the PD&E Manual, Part 2, Chapter 18 (January 14, 2019), FDOT considers noise abatement measures when future traffic noise levels attributed to a proposed roadway approach, meet or exceed the NAC, or when levels increase substantially. According to the PD&E Manual, a minimum of two impacted sites must achieve a 5 dB(A) or greater reduction in order for a noise barrier to be considered feasible. There are a couple instances where only one impacted site

Collier County Project #190062.00.00 ii January 2020 / updated July 2021 occurs in a particular area along the Veterans Memorial Boulevard study area and therefore a noise barrier was not considered for those locations. These instances are described below:

Noise sensitive sites located north of Veterans Memorial Boulevard

• A single-family home located at the south end of Brolio Way within the Mediterra residential community (receptor M1).

• A single-family home located at the south end of Frescott Way within the Mediterra residential community (receptor M2).

The TNM was used to evaluate the effectiveness of noise barriers for the remaining 53 residences that are predicted to experience noise levels that approach the NAC for Activity Category B or experience a substantial increase. Noise barriers were modeled for locations that best represent the size and configuration of the affected residential lots. At each noise barrier location, the ability to meet noise reduction requirements was first assessed. If noise reduction requirements were met, the cost reasonableness was evaluated.

Noise barriers were found to be a cost reasonable and feasible abatement measure for the impacted noise sensitive sites at Landmark Naples.

Noise barriers at Imperial Golf Estates and Secoya Reserve were found to meet the noise reduction requirements but were not cost reasonable.

Traffic Noise Technical Memorandum Update (July 1, 2021)

Subsequent to the finalization and approval of the Traffic Noise Technical Memorandum (January 17, 2020), Collier County requested an update to the noise analysis that included an additional section of Veteran’s Memorial Boulevard between Old US 41 and US 41 at the western end of the proposed improvements. This additional section does not contain noise sensitive sites adjacent to the proposed alignment as defined in any of the Activity Categories of the NAC. Therefore the monitoring of ambient noise levels and TNM prediction of the existing (2019) and future year (2040) conditions, with and without the proposed extension, is not required. A graphic and brief discussion detailing the traffic noise evaluation of the additional section of Veteran’s Memorial Boulevard between Old US 41 and US 41 is included in Appendix D.

BeeThao Highlight

Collier County Project #190062.00.00 iii January 2020 / updated July 2021

Table of Contents Executive Summary .................................................................................................................. i

1.0 Introduction ...................................................................................................... 1-1

Project Description ............................................................................................. 1-1

Existing Roadway Characteristics ...................................................................... 1-1

Build Alternative Roadway Characteristics ......................................................... 1-2

2.0 Methodology .................................................................................................... 2-1

Model and Noise Metrics ................................................................................... 2-1

Traffic Data ........................................................................................................ 2-2

Noise Abatement Criteria ................................................................................... 2-2

Noise Abatement Measures ............................................................................... 2-5

2.4.1 Traffic Management Measures ............................................................... 2-5

2.4.2 Alignment Modifications .......................................................................... 2-6

2.4.3 Land Use Controls .................................................................................. 2-6

2.4.4 Noise Barriers ......................................................................................... 2-9

3.0 Traffic Noise Analysis ..................................................................................... 3-1

Existing Conditions ............................................................................................ 3-1

Noise Model Validations .................................................................................... 3-3

Predicted Noise Levels ...................................................................................... 3-4

Noise Abatement Analysis ................................................................................. 3-4

3.4.1 Landmark Naples Mobile Homes ............................................................ 3-5

3.4.2 Imperial Golf Estates and Secoya Reserve............................................. 3-9

4.0 Conclusions ..................................................................................................... 4-1

5.0 Construction Noise and Vibration .................................................................. 5-1

6.0 References ....................................................................................................... 6-1

Collier County Project #190062.00.00 iv January 2020 / updated July 2021

List of Figures Figure 1-1 Project Location Map ............................................................................................. 1-1

Figure 1-2 Preferred Typical Section A-A and B-B .................................................................. 1-3

Figure 1-3 Preferred Typical Section C-C and D-D ................................................................. 1-4 Figure 2-1 Noise Levels for Common Outdoor and Indoor Activities ....................................... 2-1

Figure 2-2 Noise Contours (from Old US 41 to Future High School Entrance) ........................ 2-7

Figure 2-3 Noise Contours (from Future High School Entrance to Livingston Road) ............... 2-8

Figure 3-1 Landmark Naples Barrier Analysis ......................................................................... 3-5

Figure 3-2 Imperial Golf Estates and Secoya Reserve Barrier Analysis .................................. 3-9

List of Tables

Table 2-1 Traffic Volume Characteristics used in TNM ............................................................ 2-2

Table 2-2 Noise Abatement Criteria ........................................................................................ 2-3

Table 2-3 Estimated Noise Contours ....................................................................................... 2-6

Table 3-1 Noise Monitoring Data ............................................................................................. 3-2

Table 3-2 Noise Model Validations .......................................................................................... 3-4

Table 3-3 Noise Barrier Analysis Results – Landmark Naples ................................................. 3-7

Table 3-4 Feasibility and Reasonableness Factors for the Landmark Naples ......................... 3-8

Table 3-5 Noise Barrier Analysis Results – Imperial Golf Estates and Secoya Reserve ........ 3-10 Table 5-1 Construction Noise and Vibration Sensitive Sites .................................................... 5-1

List of Appendices

Appendix A Traffic Data Appendix B Predicted Noise Levels Appendix C Aerials (With Concept Plan And Receptor Sites) Appendix D Traffic Noise Technical Memorandum Update (July 1, 2021)

Collier County Project #190062.00.00 1-1 January 2020 / updated July 2021

1.0 INTRODUCTION

Project Description

The Collier County Transportation Engineering Division is conducting a preliminary engineering study to evaluate potential extension and widening of Veterans Memorial Boulevard. The preliminary engineering study corridor extends from Old US 41 eastward towards the intersection of Veterans Memorial Boulevard and Livingston Road, a distance of approximately 2.25 miles.

The project limits are shown in Figure 1-1.

Figure 1-1 Project Location Map

The purpose of the preliminary engineering study is to evaluate engineering and environmental data and document information that will aid Collier County in determining the type, preliminary design and location of the proposed improvements. The study is being done to determine stormwater management potential, permitting and environmental requirements.

Existing Roadway Characteristics

The Veterans Memorial Boulevard corridor is an undeveloped strip of land with a portion of the roadway already developed at the eastern end where it intersects Livingston Road. The surrounding area is suburban and characterized by residential developments, forested land and some commercial development. Much of the existing development includes features located close to the proposed right-of-way.

SECTION 1.0

INTRODUCTION

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 1-2 January 2020 / updated July 2021

Build Alternative Roadway Characteristics

Four typical sections were analyzed for this study. The typical sections provided for the noise analysis (Preliminary Roadway Geometry, RWA Engineering, August 15, 2019) include four 11-foot travel lanes, 5-foot bike lanes, type-F curb, a 25-foot median, and 6-foot sidewalks with a 6-foot landscape strip separating the sidewalk from the roadway. Typical sections vary in stormwater treatment options and locations of utilities within the right-of-way. The Design speed for the roadway is 45 mph with a proposed posted speed of 35 mph. The typical sections are shown in Figure 1-2 and Figure 1-3 and the proposed roadway alignment shown on the aerials in Appendix C.

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 1-3 January 2020 / updated July 2021

Figure 1-2 Preferred Typical Section A-A and B-B

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 1-4 January 2020 / updated July 2021

Figure 1-3 Preferred Typical Section C-C and D-D

Collier County Project #190062.00.00 2-1 January 2020 / updated July 2021

2.0 METHODOLOGY

Noise is typically defined as unwanted sound. It is emitted from many sources including airplanes, factories, railroads, power generation, daily activities, plants, and vehicles. Noise levels for common outdoor and indoor activities are shown in Figure 2-1.

Figure 2-1 Noise Levels for Common Outdoor and Indoor Activities

This study was prepared in accordance with 23 CFR, Part 772, Procedures for Abatement of Highway Traffic Noise and Construction Noise (July 13, 2010). The evaluation uses methodology established by the FDOT and documented in the PD&E Manual, Part 2, Chapter 18 (January 14, 2019), Highway Traffic Noise. Part 2, Chapter 18 of the PD&E Manual is the FDOT’s official traffic noise policy.

Model and Noise Metrics

The prediction of future traffic noise levels with the proposed build alternative was performed using the Federal Highway Administration’s (FHWA) computer model for highway traffic noise prediction and analysis – the Traffic Noise Model (TNM), version 2.5. TNM predicts sound energy, in one-third octave bands, between roadways and nearby receptors while considering the intervening ground’s acoustical characteristics and topography. TNM was used to predict traffic noise levels at noise sensitive land uses along the proposed alignment of Veterans Memorial Boulevard.

SECTION 2.0

METHODOLOGY

Collier County Project #190062.00.00 2-2 January 2020 / updated July 2021

The predicted noise levels presented in this report are expressed in decibels (dB) on the A-weighted scale [dB(A)]. This scale most closely approximates the response characteristics of the human ear to traffic noise. All noise levels are reported as hourly equivalent level [Leq(h)] values, which is the equivalent steady-state sound level for a one-hour period that contains the same acoustic energy as the time-varying sound level during the same time period.

A receptor is defined as a discrete or representative location of a noise sensitive area(s) for any of the land use categories listed in FHWA’s criteria for noise abatement. Receptors representing the noise sensitive sites adjacent to the proposed alignment of Veterans Memorial Boulevard were mapped in TNM in accordance with the FDOT PD&E Manual, Part 2, Chapter 18 (January 14, 2019), Highway Traffic Noise.

TNM receptor locations for the noise sites were placed at the edge of the dwelling unit or outdoor use area closest to the proposed major traffic noise source.

Traffic Data

As stipulated in the FDOT Noise Policy – Traffic Requirements (Part 2, Chapter 18, Section

18.2.1.5 of the PD&E Manual), traffic characteristics that would yield the highest traffic noise impact for the design year were used to ensure “worst-case” traffic noise conditions in the analysis. Traffic data used in the noise analysis was developed for the proposed 2040 build condition utilizing data obtained from the Collier County High School ‘GGG’ Traffic Impact Statement (July 2, 2019) and the FDOT Quality/Level of Service Handbook (December 2012).

Traffic data for the 2040 build conditions is provided in Appendix A and includes the hourly volumes divided between cars, medium trucks, heavy trucks, and buses as required for TNM input. The vehicle speeds used in TNM are based on the proposed posted speed for the build condition (35 mph). The maximum peak-hourly traffic representing LOS “C” was used in TNM.

Table 2-1 presents the traffic volume characteristics used in TNM for the mainline traffic segments of the proposed Veterans Memorial Boulevard in 2040 build conditions.

Table 2-1 Traffic Volume Characteristics used in TNM

Traffic Segment of Veterans Memorial Boulevard

2019 Existing Condition

2040 No-Build Condition

2040 Build Condition from Old US 41 to Future High School Entrance

N/A N/A LOS C

(5,268 vph)* from Future High School Entrance to Livingston Road N/A N/A LOS C

(5,268 vph)* *vph = vehicles per hour

Noise Abatement Criteria

A noise sensitive site is any property (owner occupied, rented or leased) where frequent exterior human use occurs. To evaluate traffic noise, the FHWA has established noise levels at which abatement must be considered. These noise levels are referred to as the Noise Abatement

Collier County Project #190062.00.00 2-3 January 2020 / updated July 2021

Criteria (NAC). The NAC are noise impact thresholds for considering abatement measures. As shown in Table 2-2 NAC vary according to land use activity.

Table 2-2 Noise Abatement Criteria

Activity Category

Activity Leq(h)1 Evaluation

Location Description of Activity Category

FHWA FDOT

A 57 56 Exterior

Lands on which serenity and quiet are of extraordinary significance and serve an important public need and where the preservation of those qualities is essential if the area is to continue to serve its intended purpose.

B 67 66 Exterior Residential

C2 67 66 Exterior

Active sports areas, amphitheaters, auditoriums, campgrounds, cemeteries, day care centers, hospitals, libraries, medical facilities, parks, picnic areas, places of worship, playgrounds, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, recreational areas, Section 4(f) sites, schools, television studios, trails, and trail crossings.

D 52 51 Interior

Auditoriums, day care centers, hospitals, libraries, medical facilities, places of worship, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, schools, and television studios.

E2 72 71 Exterior Hotels, motels, offices, restaurants/bars, and other developed lands, properties or activities not included in A-D or F.

F - - -

Agriculture, airports, bus yards, emergency services, industrial, logging, maintenance facilities, manufacturing, mining, rail yards, retail facilities, shipyards, utilities (water resources, water treatment, electrical), and warehousing.

G - - - Undeveloped lands that are not permitted.

(Based on Table 1 of 23 CFR Part 772)

1. The Leq(h) Activity Criteria values are for impact determination only and are not design standards for noise abatement measures.

2. Includes undeveloped lands permitted for this activity category.

As defined in 23 CFR 772, traffic noise impacts occur when predicted future traffic noise levels associated with the proposed improvements approach or exceed the NAC or when predicted future traffic noise levels substantially exceed the existing condition noise levels. FDOT defines “approach” to mean within 1 dB(A) of the NAC. A substantial increase in noise is defined as an increase of 15 or more decibels above the existing noise level as a direct result of a proposed transportation improvement project.

For example, Activity Category B (residential) applies to a majority of the noise sensitive land uses within the study limits. Under Activity Category B, noise abatement measures would be considered if the predicted future exterior levels from the proposed improvements are 66 dB(A)

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 2-4 January 2020 / updated July 2021 or higher, or if the predicted future traffic noise levels exceed the existing condition noise levels by 15 dB(A) or more.

Common noise environments are defined in the PD&E Manual, Part 2, Chapter 18 (January 14, 2019) as groups of receptors within the same activity category of FHWA’s NAC that are exposed to similar noise sources and levels; traffic volumes, traffic mix, speed and topographic features.

The developed lands along the project corridor include both noise sensitive and non-noise sensitive sites. Field reviews within the project limits revealed 124 noise sensitive sites in the vicinity of the proposed alignment of Veterans Memorial Boulevard for inclusion within the analysis. The locations of these sites are mapped on the aerials (with concept plan and receptor sites) provided in Appendix C.

The receptors placed in the noise model representing the identified noise sensitive sites adjacent to the proposed alignment of Veterans Memorial Boulevard have been divided into five groups (noise sensitive areas). The groupings identify noise sensitive sites associated with single family homes, mobile homes, townhomes and school locations within specific communities. The letters at the beginning of the receptor name identify the community and the number represents the receptor numerical identification. For example, receptor L9 represents the ninth site in the Landmark Naples community. Another example is receptor I2 representing the second site in the Imperial Golf Estates community. A summary description of the noise sensitive sites modeled in this analysis as detailed by each NAC Activity Category is provided below.

Activity Category A Activity Category A covers lands on which serenity and quiet are of extraordinary significance and serve an important public need and where the preservation of those qualities is essential if the area is to continue to serve its intended purpose. No Activity Category A land uses are located adjacent to the proposed alignment of Veterans Memorial Boulevard within the study limits.

Activity Category B Activity Category B includes the exterior impact criteria for residential land uses which include single family homes, mobile homes, condominiums, and/or townhomes adjacent to the proposed alignment of Veterans Memorial Boulevard. There are 121 residences within the study limits that were evaluated within Activity Category B as part of this traffic noise analysis.

Activity Category C Activity Category C applies to the exterior traffic noise levels at a variety of noise sensitive land uses that include active sports areas, amphitheaters, auditoriums, campgrounds, cemeteries, day care centers, hospitals, libraries, medical facilities, parks, picnic areas, places of worship, playgrounds, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, recreational areas, Section 4(f) sites, schools, television studios, trails and trail crossings. Three Activity Category C noise sensitive sites (Veterans Memorial Elementary School) are located adjacent to the proposed alignment of Veterans Memorial Boulevard within the study limits. The sites are represented by receptors V1-V3.

Collier County Project #190062.00.00 2-5 January 2020 / updated July 2021

Activity Category D Activity Category D applies to the interior traffic noise levels at a variety of noise sensitive land uses that include auditoriums, day care centers, hospitals, libraries, medical facilities, places of worship, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, schools, and television studios. No Activity Category D land uses are located adjacent to the proposed alignment of Veterans Memorial Boulevard within the study limits.

Activity Category E Activity Category E represents hotels, motels, offices, restaurants/bars, and other developed lands, properties or activities not included in categories A-D or F. No Activity Category E land uses are located adjacent to the proposed alignment of Veterans Memorial Boulevard within the study limits.

Activity Category F Activity Category F land uses include agriculture, airports, bus yards, emergency services, industrial logging, maintenance facilities, manufacturing, mining, rail yards, retail facilities, shipyards, utilities (water resources, water treatment, electrical), and warehousing. There is no NAC level for this activity category since the FHWA considers these land uses as not sensitive to highway traffic noise; therefore, no noise analysis is required for these locations.

Activity Category G Activity Category G includes undeveloped lands that are not permitted for construction. There is no NAC level for Activity Category G and consideration of mitigation is not required. However, the determination and documentation of highway traffic noise levels through the development of noise contours is useful for providing this information to local governments in advance of future development. Noise contours are developed to illustrate the best estimate of the distance from the edge of the nearest proposed travel lane at which traffic noise would approach or exceed the NAC for Activity Categories A, B, C and E. Land use controls and noise contours are discussed further in Section 2.4 and will assist local officials in planning and permitting future noise compatible land uses on undeveloped parcels.

Noise Abatement Measures

As outlined in the PD&E Manual, Part 2, Chapter 18 (January 14, 2019), FDOT considers noise abatement measures when future traffic noise levels attributed to proposed roadway improvements approach, meet or exceed the NAC, or when levels increase substantially. These measures may include traffic management, alignment modifications, land use controls, and noise barriers. The following discusses the feasibility (i.e., amount of noise reduction, engineering considerations) and/or reasonableness (i.e., number of noise sensitive sites benefited, absolute noise levels, cost, etc.) of these measures.

2.4.1 Traffic Management Measures

Traffic control measures that limit motor vehicle speeds and restrict certain vehicle types can be effective noise mitigation measures. However, these measures may also negate a project’s ability to meet the need of the facility. For example, prohibiting heavy trucks from using Veterans

Collier County Project #190062.00.00 2-6 January 2020 / updated July 2021

Memorial Boulevard would lower traffic noise levels; however, it would also eliminate the ability to efficiently move people and goods through the study limits. Therefore, this method of noise mitigation is not considered reasonable.

2.4.2 Alignment Modifications

Alignment modification involves shifting the roadway alignment at sufficient distances from residential areas to minimize traffic noise. Because of limited right-of-way, shifting the Veterans Memorial Boulevard alignment to reduce impacts would likely result in more severe impacts, including property acquisitions, residential relocations, and other environmental impacts. For these reasons, shifting the alignment to reduce traffic noise impacts would result in other undesirable impacts and is not considered a reasonable measure to reduce predicted noise levels associated with this proposed project.

2.4.3 Land Use Controls

Another noise abatement measure is to use land use controls to minimize impacts to future development. Providing a buffer between a roadway and future noise sensitive land uses is an abatement measure that can minimize/eliminate noise impacts in areas of future development.

To encourage use of this abatement measure through local land use planning, noise contours have been developed.

Noise contours were developed to illustrate the best estimate of the distance from the edge of the nearest proposed travel lane at which traffic noise would approach the NAC for Activity Categories A, B, C, D and E adjacent to the proposed at grade roadway. These noise contours do not consider any shielding of noise provided by structures between the noise sensitive receptor and the roadway. Table 2-3 will assist local officials in planning and permitting future noise compatible land uses adjacent to the proposed alignment of Veterans Memorial Boulevard. These contours are also shown graphically in Figure 2-2, and Figure 2-3.

Table 2-3 Estimated Noise Contours

Traffic Segment of Veterans Memorial Boulevard

NAC Activity Category A – 56 dB(A) B/C – 66 dB(A) D – 51 dB(A)* E – 71 dB(A)

From Old US 41 to Future High School Entrance 300 feet 71 feet < 20 feet 25 feet

From Future High School Entrance to Livingston Road 300 feet 72 feet < 20 feet 25.5 feet

*Represents an interior noise level. A reduction factor of 25 dB(A) is applied to the modeling results consistent with guidance from FHWA Highway Traffic Noise: Analysis and Abatement Guidance (August 11, 2010) in order to identify the estimated contour distance for NAC Activity Category D.

Collier County Project #190062.00.00 2-7 January 2020 / updated July 2021

Figure 2-2 Noise Contours (from Old US 41 to Future High School Entrance)

Collier County Project #190062.00.00 2-8 January 2020 / updated July 2021

Figure 2-3 Noise Contours (from Future High School Entrance to Livingston Road)

Collier County Project #190062.00.00 2-9 January 2020 / updated July 2021

2.4.4 Noise Barriers

Noise barriers reduce noise levels by blocking the sound path between a roadway and noise sensitive site. To achieve the most efficient reduction of traffic noise, a noise barrier must be relatively long, continuous (with no intermittent openings for driveways, etc.) and of sufficient height.

Noise barriers located along the right-of-way line are most commonly evaluated in TNM for heights ranging from 8 feet to 22 feet in 2-foot increments. For each evaluated height, the length of a barrier is optimized to minimize cost while trying to maintain at least a 5 dB(A) reduction at noise sensitive sites that have predicted noise levels that approach or exceed the NAC.

Consistent with FDOT guidance, for a noise barrier to be considered feasible and cost reasonable, the following minimum conditions must be met:

• A noise barrier must provide at least the minimum noise reduction of 5 dB(A) at two impacted noise sensitive sites with a reduction of 7 dB(A) or more at one benefited noise sensitive site.

• The cost of the noise barrier should not exceed $42,000.00 per benefited noise sensitive site. This is the reasonable cost limit established by FDOT. A benefited noise sensitive site is defined as a site that would experience at least a 5 dB(A) reduction as a result of constructing a noise barrier. The current FDOT unit cost used to evaluate economic reasonableness is $30.00 per square foot, which covers barrier materials and labor. The latest Collier County unit cost is $38.00 per square foot.

Feasibility factors of noise barriers relate to driver and pedestrian sight distance (safety), access and driveway requirements for affected sites, right-of-way requirements, maintenance issues, utility impacts, and stormwater drainage factors.

Collier County Project #190062.00.00 3-1 January 2020 / updated July 2021

3.0 TRAFFIC NOISE ANALYSIS

Existing Conditions Following FHWA procedure, existing noise levels are commonly established using TNM for residential areas where traffic is a prevalent noise source and traffic data is available to predict existing noise levels. However, the Veterans Memorial Boulevard is proposed as a new alignment roadway and traffic noise is not a prevalent noise source at the noise sensitive areas along the existing project corridor. Noise monitoring was therefore performed at representative locations to establish existing conditions where traffic noise is a minor component of the noise environment or where traffic data is not available to predict traffic noise originating from a nearby road.

Noise monitoring followed the procedures documented in FHWA’s Measurement of Highway- Related Noise. Existing noise measurements were taken at six different locations using a Casella CEL-633 noise monitor. All monitoring events were ten minute intervals for 30 minutes in duration and taken at each location both in the A.M. and in the P.M. consistent with methodology documented in FDOT’s PD&E Manual. Dates, times, locations and field measured results of each noise monitoring event are provided in Table 3-1. Noise monitoring locations are also provided on the aerials in Appendix C. Noise sources during each monitoring event were noted to classify the various sources and assign a reasonable existing condition at noise sensitive locations based on physical conditions (e.g., characteristics of vegetation, presence of wildlife, types of man-made noise sources, etc.). Common natural noise sources included birds, other wildlife such as insects, and the effects of wind. Common man-made noise sources included airplanes, distant traffic, and noise generated by neighborhood activities.

SECTION 3.0

TRAFFIC NOISE ANALYSIS

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-2 January 2020 / updated July 2021

Table 3-1 Noise Monitoring Data

Monitoring Site Location

Number Location Description Event

Number Event Date Event Start Time Field

Measured Level (dBA)

1 Northwest corner of Secoya Reserve

1-1 10-8-19

1:05 pm 42.0 1-2 1:16 pm 43.9 1-3 1:27 pm 44.0 1-4

10-9-19 11:41 am 45.3

1-5 11:51 am 47.0 1-6 12:02 pm 47.8

Northwest corner of Empress Court in

Imperial Golf Estates

2-1 10-8-19

4:19 pm 43.0 2-2 4:33 pm 41.5 2-3 4:44 pm 40.7 2-4

10-9-19 9:12 am 42.6

2-5 9:23 am 39.4 2-6 9:35 am 39.7

West of the railroad crossing and east of the southern end of Business Lane

3-1 10-8-19

5:55 pm 40.7 3-2 6:07 pm 39.4 3-3 6:18 pm 39.8 3-4

10-9-19 8:16 am 41.4

3-5 8:28 am 43.5 3-6 8:39 am 40.5

North of Landmark

Naples and 450 feet east of Old US 41

4-1 10-8-19

5:13 pm 50.8 4-2 5:24 pm 51.4 4-3 5:36 pm 50.0 4-4

10-9-19 7:35 am 51.0

4-5 7:46 am 49.7 4-6 7:57 am 49.5

5 South end of Frescott Way in Mediterra

5-1 10-8-19

3:11 pm 42.8 5-2 3:22 pm 40.0 5-3 3:34 pm 38.4 5-4

10-9-19 10:11 am 40.1

5-5 10:22 am 42.5 5-6 10:33 am 40.8

Southeast corner of Monterosso Lane in

Mediterra

6-1 10-8-19

2:23 pm 54.5 6-2 2:33 pm 48.6 6-3 2:44 pm 51.0 6-4

10-9-19 10:56 am 50.4

6-5 11:07 am 47.3 6-6 11:19 am 47.0

Using the noise monitoring data, an existing noise level is assigned to residential areas where traffic noise is not a predominant noise source. The following describes the noise level assignment based on physical characteristics of a residential area:

• The existing noise level assignments for receptors located in Landmark Naples ranged from 57 to 41.2 dB(A). The higher range was assigned to the western portion of Landmark Naples closest to Old US 41, in these areas existing traffic noise from Old US 41 is prevalent and often masks noise from other sources. The lower range was assigned to

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-3 January 2020 / updated July 2021 the eastern portion of Landmark Naples, where traffic noise from Old US 41 is constant but distant, and noise from other sources is more noticeable.

• An existing noise level range of 40.8 to 49.8 dB(A) is assigned to the residential areas of Mediterra. The residential areas ranged from high density residential locations where there is no noticeable traffic noise but man-made sources of noise are common and constant to lower density areas surrounded by mostly undeveloped lands commonly having a prevalent canopy of vegetation, less maintained ground cover and/or vegetated land in a more natural state. The noise sources in the high density areas typically included numerous heat pumps, air conditioners, pool pumps and other man-made noise sources, and the sources from the lower density areas typically include more wildlife activity (e.g., birds, insects). The effect of wind passing over or through the vegetation is also noted as a noise source in these areas.

• An existing noise level range of 41.2 to 45.8 dB(A) is assigned to the receptors representing the residential areas of Imperial Golf Estates and Secoya Reserve. The area is described as a medium density residential location where there is no noticeable traffic noise but man-made sources of noise are common, but not always constant. Sources in these areas typically include heat pumps, air conditioners, pool pumps and other man-made noise sources bordering areas surrounded by vegetated land in a more natural state which results in more wildlife activity (e.g., birds, insects). The effect of wind passing over or through the vegetation is also noted as a noise source in this area.

Existing noise levels assigned to residential areas based on the monitoring data are provided in Appendix B.

Noise Model Validations To validate the accuracy of TNM as a prediction model, traffic noise levels were measured in the early afternoon of October 9, 2019, at a location adjacent to Livingston Road just to the north of the North Naples Fire Department Station 48. The Livingston Road location was chosen because of its close proximity to the proposed project and traffic noise is the primary source of noise in this area.

Traffic data including vehicle volumes by type, vehicle speeds, and meteorological conditions were recorded during each measurement period. The measurements were taken following procedures documented in Measurement of Highway-Related Noise (FHWA, 1996) using a Casella CEL-633C Type I sound level meter. The sound level meter was calibrated using a Casella CEL-120 acoustic calibrator. Speeds of passing vehicles were recorded with a Stalker Sport radar gun. The recorded traffic data were used as input in TNM to determine if, given the topography and actual site conditions of the area, the computer model could “recreate” the measured levels with the existing roadway.

Table 3-2 presents the field measurements and validation results for the location adjacent to Livingston Road. Following FDOT guidelines, a noise prediction model is considered within the accepted level of accuracy if the measured and predicted noise levels are within a tolerance

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-4 January 2020 / updated July 2021 standard of 3 dB(A). As shown, the ability of the model to predict noise levels within the FDOT limits of 3 dB(A) for the project was confirmed.

Table 3-2 Noise Model Validations

Site Run Measured Leq(h) Predicted Leq(h) Differences

Validation Measurement Location

West of Livingston Road just to the north of the North Naples Fire

Department Station 48

1 60.9 63.0 2.1

2 60.2 62.6 2.4

3 59.8 62.7 2.9 *Noise levels represented in dB(A)

Predicted Noise Levels The predicted traffic noise levels for 124 noise sensitive sites adjacent to the proposed alignment of Veterans Memorial Boulevard are shown in the Predicted Noise Level Table located in Appendix B. The TNM noise prediction model was used to predict traffic noise levels at 124 noise sensitive sites adjacent to the proposed alignment of Veterans Memorial Boulevard for the future year (2040) conditions with the proposed improvements. The proposed build alternative is predicted to result in traffic noise levels ranging from 49.8 dB(A) to 66.3 dB(A) for NAC Activity Category B (residential) and 63.4 dB(A) to 64.1 dB(A) for Activity Category C (recreational). Of the 124 noise sensitive sites evaluated, nine (9) residences are predicted to experience future noise levels that approach the NAC for Activity Category B [66 dB(A) or more], and 46 residences are predicted to experience future noise levels that exceed the substantial increase [15 dB(A) or more] with the proposed extension and widening of Veterans Memorial Boulevard.

Noise Abatement Analysis

As outlined in the PD&E Manual, Part 2, Chapter 18 (January 14, 2019), FDOT considers noise abatement measures when future traffic noise levels attributed to a proposed roadway approach, meet or exceed the NAC, or when levels increase substantially. According to the PD&E Manual, a minimum of two impacted sites must achieve a 5 dB(A) or greater reduction in order for a noise barrier to be considered feasible. There are a couple instances where only one impacted site occurs in a particular area along the Veterans Memorial Boulevard study area and therefore a noise barrier was not considered for those locations. These instances are described below:

Noise sensitive sites located north of Veterans Memorial Boulevard

• A single-family home located at the south end of Brolio Way within the Mediterra residential community (receptor M1).

• A single-family home located at the south end of Frescott Way within the Mediterra residential community (receptor M2).

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-5 January 2020 / updated July 2021

The TNM was used to evaluate the effectiveness of noise barriers for the remaining 53 residences that are predicted to experience noise levels that approach the NAC for Activity Category B and/or experience a substantial increase. Noise barriers were modeled for locations that best represent the size and configuration of the affected residential lots. At each noise barrier location, the ability to meet noise reduction requirements was first assessed. If noise reduction requirements were met, the cost reasonableness was evaluated. The discussions of the representative noise barriers modeled are provided below with respect to their location within the Veterans Memorial Boulevard study limits from west to east. All barriers were modeled in TNM at a location inside of the proposed right-of-way.

3.4.1 Landmark Naples Mobile Homes

With the proposed extension of Veterans Memorial Boulevard, 23 residences represented by receptors L13 thru L35 at Landmark Naples are predicted to experience future noise levels that exceed a substantial increase, approach the NAC Activity Category B, or both. A noise barrier was evaluated across the entire frontage of the property adjacent to Veterans Memorial Boulevard to abate for these future noise levels as shown in Figure 3-1. The locations of these impacted receptors are shown on sheet 1 of the concept plans provided in Appendix C.

Figure 3-1 Landmark Naples Barrier Analysis

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-6 January 2020 / updated July 2021

The eastern and western ends of the barrier were optimized using the TNM to successfully achieve the minimum noise reduction requirements of 5 dB(A) at two impacted residences and 7 dB(A) at one impacted residence, at each height evaluated, from 8 to 22 feet in increments of 2 feet. The results of the evaluation are shown in Table 3-3.

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-7 January 2020 / updated July 2021

Table 3-3 Noise Barrier Analysis Results – Landmark Naples

Barrier Height (feet)

Barrier Length (feet)

Number of

Impacted Receptors

Noise Reduction at Impacted Receptors1

Number of Benefited Receptors2

Average Reduction for Benefited Receptors

(dB(A))1

Total Estimated Cost - low end3

Total Estimated

Cost -high end4

Cost per Benefited Receptor

- low end3

Cost per Benefited Receptor

- high end4

5 -5.9 dB(A)

6 -6.9 dB(A)

>7 dB(A) Impacted Not

Impacted Total

8 1,412

0 6 15 21 0 21 7.4 $338,880 $429,248 $16,137 $20,440

10 1,412 1 0 21 22 0 22 9.1 $423,600 $536,560 $19,255 $24,389

12 1,412 0 0 22 22 0 22 10.5 $508,320 $643,872 $23,105 $29,267

14 1,412 0 0 22 22 0 22 11.6 $593,040 $751,184 $26,956 $34,145

16 1,380 1 0 22 23 0 23 12.3 $662,400 $839,040 $28,800 $36,480

18 1,340 1 0 22 23 0 23 13.2 $723,600 $916,560 $31,461 $39,850

20 1,320 1 1 21 23 0 23 13.8 $792,000 $1,003,200 $34,435 $43,617

22 1,360 1 0 22 23 4 27 13.0 $897,600 $1,136,960 $33,244 $42,110

1Receptors with a predicted noise level of 66 dB(A) or greater or a substantial increase of 15dB(A) or greater.

2Receptors with a predicted reduction of 5 dB(A) or more are considered benefited.

3Based on a unit cost of $30 per square foot (FDOT) of barrier on the low end.

4Based on a unit cost of $38 per square foot (County) of barrier on the high end.

57 dB(A) reduction not achieved at any receptor.

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-8 January 2020 / updated July 2021

As represented in Table 3-3, a noise barrier located along the right-of-way line and adjacent to Landmark Naples is predicted to provide the necessary noise reduction to all 23 of the impacted residences for barrier heights modeled between 16 and 22 feet. The barrier failed to provide the necessary noise reduction for the residence represented by receptor L35 below the 16-foot height, due to its proximity to the end of the barrier. Additionally, the barrier failed to provide the necessary noise reduction for the two residences represented by receptors L34 and L35 at the 8-foot height, due to their proximity to the end of the barrier.

Because this noise barrier is predicted to provide the impacted residences with a reduction in traffic noise of at least 5 dB(A) at a cost below the FDOT cost reasonable guideline for heights between 8 and 18 feet, the noise barrier was evaluated further. Table 3-4 lists the additional considerations that were evaluated. Based on the results of this study, a noise barrier adjacent to Landmark Naples appears to be a potentially feasible and cost reasonable noise abatement measure. The noise barrier and the factors considered in Table 3-4 should be reevaluated during the final design phase of the project when more physical engineering data (survey, drainage, utilities, etc.) is obtained.

Table 3-4 Feasibility and Reasonableness Factors for the Landmark Naples

Feasibility and Reasonableness

Factors Comments

1. Noise Reduction Factor

21-23 impacted residences are predicted to receive at least a 5 dB(A) insertion loss for barrier heights between 8 and 22 feet.

2. Design and Construction Factors

The constructability of the barrier should be reviewed in greater detail as part of the design process. Consideration should be given to any existing landscaping, and any utilities within the right-of-way. The noise barrier system was evaluated within the proposed right-of-way line.

3. Safety Factors The barrier would be located within the proposed right-of-way and the safety of motorists, pedestrians and bicyclists traveling adjacent to the modeled barrier should be considered. A final review should be made during the final design phase of the project.

4. Access Factors The barrier will not have an impact on accessibility to adjacent properties.

5. Right-of-Way

Factors It does not appear that additional right-of-way would need to be acquired to accommodate the modeled noise barrier.

6. Maintenance Factors

Maintenance access between the proposed right-of-way and the modeled noise barrier system should be considered during the final design phase of the project.

7. Drainage Factors

The potential for drainage of stormwater along the modeled barrier should be evaluated during the final design phase to determine if special accommodations are necessary.

8. Utility Factors

Potential lighting and buried or overhead utility conflicts associated with the construction of the barriers should be evaluated in greater detail as part of the design process.

9. Viewpoint of Benefited Receptors

Viewpoints of the public regarding traffic noise will be documented as received from the public workshop, public hearing or other mediums to be referenced during the final design phase.

10. Cost Effectiveness The cost is within FDOT's cost reasonable guideline of $42,000 per benefited site.

11. Noise Reduction Design Goal

The evaluated barrier meets the design goal of a 7 dB(A) reduction for at least one receptor at all barrier heights.

Veterans Memorial Blvd. PD&E Study Traffic Noise Technical Memorandum Collier County Project #190062.00.00 3-9 January 2020 / updated July 2021

3.4.2 Imperial Golf Estates and Secoya Reserve

With the proposed extension of Veterans Memorial Boulevard, 30 residences represented by receptors I1-I9, I11-I16, I18-I20, I23-I30, I32 and I-33 in Imperial Golf Estates, and S1 and S2 in Secoya Reserve are predicted to experience future noise levels that exceed the substantial increase [15 dB(A) or more]. Due to the proximity of the two communities, a barrier system was evaluated for both. To accommodate the driveway access to Veterans Memorial Boulevard for the residents of Secoya Reserve, a system of two noise barriers was evaluated to abate for future noise levels as shown in Figure 3-2. The locations of impacted receptors and barriers are also shown on sheets 4-7 of the concept plans provided in Appendix C.

Figure 3-2 Imperial Golf Estates and Secoya Reserve Barrier Analysis

The eastern and western ends of the barrier system were optimized using the TNM to successfully achieve the minimum noise reduction requirements of 5 dB(A) at two impacted…