Attachment C Transportation Management Plan.docx

Department of Transportation Region 4 Headquarters 63055 N Hwy 97, Bldg K Bend, OR 97701 Phone: (541) 388-6180 Fax: (541) 388-6231

Created: March 27, 2025 Updated:

To: Ramon Alonso

US97 (The Dalles-California Highway #004) is a critical part of the State’s transportation system functioning as a critical north-south freight route that supplies goods and services to the local communities while also providing a Central Oregon route connecting California and Nevada to the Pacific Northwest. Additionally, it is an important highway for local commuting, agricultural, and recreational traffic for the surrounding communities. Keeping the highways in good condition and ensuring they are developed in contributing to a safe and efficient transportation system that supports livability and economic viability are critical goals of the Oregon Department of Transportation (ODOT). The following Transportation Management Plan will cover construction staging, related traffic impacts and communication plan.

Project Purpose and Need, Goals and Objectives Three new bridges from the Bend North Corridor project require sealant. The US 97 North Corridor Bridge Treatment project is to apply a silane treatment to the bridge decks. Existing striping, including retro-reflectivity levels, will not be impacted by the application of the sealant.

Project Area Characteristics The project includes three bridges, located on US97 The Dalles-California Highway from MP 134.04-135.28, at the north end of the Bend parkway. A vicinity map indicating the bridge locations has been provided in Figure 1.

According to the 1999 Oregon Highway Plan, the project section of US97 is classified as a “statewide” highway, a federally designated truck route, an Oregon freight route, and a reduction review route on the National Highway System. According to the 2021 ODOT Functional Classification and National Highway System Status, the project section of US97 is classified as a “urban other principal arterial”.

The Freight Mobility Map identifies US97 as an “Orange Route,” indicating that the route is generally unrestricted for oversized/overweight freight and is one of the most heavily used truck routes in the state. The route is an up to 14’ wide Annual Route (allowed to travel during daylight hours) and sees extensive use for loads greater than 14’ wide by use of a Single Trip Permit. At night, this route allows annual permits up to 10’ wide to travel. Nighttime is defined as ½ hour after sunset until ½ hour before sunrise.

At BR24261 and BR24240, US97 is 4-lane highway with two 12ft travel lanes each direction, separated by a concrete barrier, and 3-10ft paved shoulders. BR 24260 is an exit from US97 onto NE 3rd St, with one 16ft travel lane and 4-6ft shoulders. The 2023 Average Annual Daily Traffic (AADT) along the project section of highway is 56,918 vehicles per day, with trucks accounting for 5.8% of the AADT (TransGIS). The posted speed on US97 is 45mph for the project segments.

Figure 1. Project Vicinity Map

Work Zone Traffic Analysis A work zone traffic analysis was conducted using traffic volumes from the Bend-Empire ATR 09-007 located at MP 135.95 on US97. Given that the ATR is located within the project limits, an AADT adjustment factor was not applied. Based on monthly data from the ATR, the peak traffic volumes (non-holiday) on this route typically occurred in July. Therefore, traffic count data from July 2023 was utilized for this analysis requiring no seasonal adjustment.

ATR volumes were further adjusted to the 2025 construction year assuming an annual growth rate of 4.72% (based on 2021-2023 ATR 09-007 annual history) and converted to Passenger Car Equivalent (PCE) values assuming a PCE factor of 2.5 (rolling terrain) and an average truck percentage of 5.60% (2023 OTMS Traffic Volumes and Vehicle Classification; MP 135.54). Using ODOT work zone traffic analysis methodologies, the average delays anticipated during a single lane closure of the multilane highway were estimated in order to identify typical traffic patterns throughout the week and ultimately determine the appropriate lane restrictions for the project.

The results of this analysis indicate that single lane closures can be allowed any day from 8pm to 7am. Average delay estimates as a result of single lane closures during the identified timeframes range from 1 to 5 minutes. Based on the results of this analysis, constructability considerations, and efforts to minimize delay to the traveling public, Region 4 Traffic recommends allowing single lane closure on BR24240 and BR24261 8pm to 7am Sunday night through Friday morning.

US97 Exit Ramp to BR2460 Closure and Detour Route Due to the available width at BR24260 on the US97 exit to 3rd St, this exit ramp will be closed to accommodate work and a detour will be in place. The road will be closed at the US97 exit 135A. Traffic will be detoured via US97 exit 135B to Empire Ave to US20 as shown in Figure 2. This closure will be allowed from 8pm-7am Sunday night through Friday morning. The expected duration of work is 1 night. Comment by GIBSON Teresa: Recommend adding detour map.

Exit 135A Closure

BR24260

To US20 To 3rd St

Figure 2. Detour for Exit 135A Closure Construction Staging, TPAR and Consideration of Mobility and Over-Sized Vehicles The project is scheduled for construction in July-August of 2025. Construction activities at BR24240 and BR24261 are anticipated to utilize single lane closures maintaining 17ft width for traffic in each direction. BR24260 will require a closure and detour route. Lane closures and temporary traffic control will be implemented according to the 2024 Oregon Standard Specifications for Construction, sections 00220 and 00225 of the project Special Provisions, and any applicable ODOT TM800 Series Standard Drawings.

Pedestrian and bicycle volumes are anticipated to be low on US97 and are currently utilizing the existing shoulders and will need to be accommodated in accordance with Standard Specification 00220.02(b). The Temporary Pedestrian Accessible Route (TPAR) will be maintained along the shoulder.

Special consideration for all traffic and freight accessibility through the project area is necessary. One item is horizontal clearance, which is the available pavement width measured across the road from any fixed object to the face of a guardrail, barrier or other fixed object. The ODOT Commerce and Compliance Division (CCD) requires notification when reducing the horizontal clearance on a highway route to less than 28 feet for two lanes of one-way traffic (single lane in each direction) or less than 22 feet for one lane of one-way traffic (bi-directional alternating traffic).

Single lane closures with soft barriers will be utilized at BR24240 and BR24261 along the US97 mainline. A 17ft minimum horizontal clearance will be maintained (anticipate 2 nights per bridge). Annuals will not be impacted. Single Trip Permits (STPs) requiring greater horizontal clearance during single lane closures can be accommodated unannounced with a delay of 20 minutes or less (considered no impact). The detour accommodates the same size loads that currently utilize the US97 Exit 135A Ramp. Comment by GIBSON Teresa: How many nights of work anticipated?

Factors Impacting Traffic and Work Zone Strategies The proposed temporary impacts to traffic flow include subsequent delays as a result from single lane closures and out of direction travel during construction activities. In addition, the following impacts should be considered and included in specifications as necessary:

Holidays and seasonal events may impact traffic in the project area. The major holidays are included as standard restrictions in the 2024 Oregon Standard Specifications for Construction, section 00220.40(e-2a), which includes applicable provisions for lane restrictions. Local and seasonal events requiring unique lane restrictions will be identified (if applicable) in the project special provisions section 0020.40(e-2b). The following special events have been identified and should be listed as additional items in the special provision section:

· None identified

Consideration and coordination efforts should be made to reduce corridor impacts and delays as a result of multiple projects being performed on, near or adjacent to this section of US97 and the I-5 Critical Route Pair (CRP) during the anticipated 2025 construction season. The I-5 CRP was not reviewed given the project will be accommodating unannounced oversize loads thru the work zone with 20 minute or less delay on mainline US97 and considered no mobility impact.

Public Information/Outreach and Work Zone Safety Strategies Public information and outreach are beneficial for maintaining public support for projects, as well as encouraging changes in travel behaviors during project construction. Keeping the public aware of delays as they occur may encourage local motorists to use alternate routes, which may help manage congestion throughout the project locations. ODOT Region 4 Community Affairs Coordinator and Project Manager will be responsible for communicating the project’s goals and impacts to citizens, elected officials, the freight community, businesses, and to the traveling public. The following table represents typical communications that should occur between parties and groups throughout the project:

ODOT Region 4 Traffic Operations Center (TOC) ODOT District 10 Deschutes County Schools, Business Owners, and Residents General Public and road users Emergency Responders (police, fire, medical) Media and Other Interested Parties

In addition, the following traffic management and operation strategies should be considered to support the construction activities and promote work zone safety of the project.

· Portable Changeable Message Signs (PCMS): A PCMS is a portable electronic sign that can be used to display changeable messages. These signs can be used to inform drivers of upcoming construction periods and warn drivers of construction activities as needed.

· Ground Mounted Signs: Signs can be installed at the endpoints of work zones to inform motorists of road construction.

· TripCheck (ODOT Website): TripCheck allows motorists to access real time information and weather conditions through the Internet. Motorists may also call 511 to receive this information.

· On-Site Communications: ODOT personnel will be on site during construction activities. Cell phones and/or State Radio communications will be maintained to report incidents within the work zone.

· Coordination with Adjacent Construction Projects: To minimize corridor delay, the contractor and ODOT will coordinate lane closures with other adjacent projects that may impact traffic during construction.

· Incident Management: A planned and coordinated program that detects and removes incidents from the highway and restores traffic capacity as safely as possible. If an incident occurs during the construction of the project, the inspector will call the Region 4 Dispatch Center (541-383-0121) and the appropriate actions will be taken. All emergency vehicles will be allowed immediate passage through the project at all times.

Construction Monitoring Construction staff, in conjunction with the work zone traffic control designer, should monitor the work zone and make changes if necessary. Any changes to the work zone strategies, including contractor-proposed modifications, should be consistent with the decisions and commitments made during the design of the project. All changes to the work zone strategies should involve the work zone traffic control designer and region mobility liaison and should be documented.

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