K22128_Supporting_Docs_Cascade_and_185th.pdf
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- Solicitation number
- 2025.092-REQ
- Issued by
- Washington County, Amity City, Oregon
About this file
This supporting document is a screening memorandum prepared by Washington County, Oregon, for an arterial pedestrian crossing project at SW 185th Avenue and SW Cascade Drive. The document provides comprehensive analysis of existing conditions, traffic patterns, and recommendations for pedestrian crossing improvements at this intersection located in the Aloha community. The proposed crossing site is situated where SW 185th Avenue, an arterial roadway with five lanes and designated as a truck route, intersects with SW Cascade Drive, a local street. SW 185th Avenue serves as a designated pedestrian parkway with streetscape overlay and enhanced major street bikeway within a pedestrian/bicycle district. Current vehicular volumes on SW 185th Avenue total 26,711 daily vehicles with morning and evening peak hour volumes of 1,670 and 1,790 vehicles respectively; approximately 7.5 percent of traffic consists of heavy vehicles. The 85th percentile travel speed is 46 mph on a roadway with a posted 45 mph speed limit. Transit service is provided by Line 52 with 15-minute headways during peak periods and 30-minute headways otherwise, serving approximately 49 combined daily passengers across two nearby stops.
The screening memorandum notes that existing pedestrian and bicycle volumes are minimal, with only 4 pedestrians and 0 bicyclists recorded during the study period, though sensitivity analysis indicates potential for growth. Under current conditions, an enhanced crossing is not supported by NCHRP Report 562 methodology; however, the analysis projects that with modest growth—up to 92 pedestrians/bicyclists and a 20 percent vehicle increase—enhanced crossing treatments would be justified. The long-term recommendation calls for installing pedestrian hybrid beacon signals at the north and south crossing legs, high-visibility pavement markings and signage, ADA-compliant pedestrian ramps, and evaluation of street lighting conditions. The site serves a diverse demographic area with 10-20 percent low-income households, over 40 percent non-white population, and approximately 20-30 percent each of residents under 18 and over 64 years old. No crashes involving pedestrians or bicyclists have been recorded in the vicinity, and five total crashes—one with minor injury and four property damage only—occurred in the study area. The document supports the crossing based on moderate land use benefits, improved safety on the high-speed arterial, social equity considerations for the surrounding demographic, and moderate connectivity improvements for the designated pedestrian parkway and bikeway corridor.
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Washington County Arterial Pedestrian Crossing Project Screening Memorandum | Site #10: SW 185th Ave at SW Cascade Dr
WASHINGTON COUNTY Page 10-1
Site #10: SW 185th Ave at SW Cascade Dr The proposed crossing site is on SW 185th Ave near SW Cascade Dr.
Source: Google Earth
Roadway Designation Roadway Functional Classification: SW 185th Ave is classified as an arterial and SW Cascade Dr is classified as a local street.
Truck Route Designation: SW 185th Ave is designated as a truck route.
Other Designations: Other designations include:
» SW 185th Ave is designated as a pedestrian parkway with a streetscape overlay (north of SW Johnson St to north of SW
Blanton St).
» SW 185th Ave is designated as an enhanced major street bikeway.
» The site is located in a pedestrian/bicycle district.
Roadway Configuration
CURRENT CONFIGURATION
This section of SW 185th Ave has a five-lane cross section, including four
12-foot travel lanes, a 14-foot two-way left-turn lane, and two 6-foot bike lanes. The overall crossing distance is approximately 74 feet.
Sidewalks are on both sides of SW 185th Ave.
Facing north along SW 185th Ave Facing south along SW 185th Ave
PLANNED IMPROVEMENTS
There are no planned improvements along SW 185th Ave or SW
Cascade Dr in the site vicinity.
Transit Service Service Routes: Line 52 provides weekday service along SW 185th Ave on approximately 15-minute headways during peak time periods and on 30-minute headways during all other times of the day.
Stop Locations: Stop 6945 is located north of SW Cascade Dr on the east side of SW 185th Ave and Stop 6946 is located south of SW
Cascade Dr on the west side of SW 185th Ave.
Weekday Ridership: An average of 28 passengers (18 ons, 10 offs) use
Stop 6945 and 21 passengers (nine ons, 12 offs) use Stop 6946.
SW Cascade Dr SW th S t
Washington County Arterial Pedestrian Crossing Project Screening Memorandum | Site #10: SW 185th Ave at SW Cascade Dr
WASHINGTON COUNTY Page 10-2
Land Use
EXISTING ZONING/LAND USE
Zoning: Zoning includes a mix of residential (R-24) and commercial
(CBD).
Land Use: Land uses include a mix of single family and multifamily residential on both sides of the roadway and various commercial uses to the south.
Pedestrian/Bicycle Generators: The primary generators include residential uses and transit stops, as well as the various commercial uses to the south.
PROPOSED/PLANNED LAND USE
There are no proposed or planned land uses along SW 185th Ave or SW
Cascade Dr in the area.
Demographics Low Income: Approximately 10-20% of households are under the poverty line.
Minority: Over 40% of the population is non-white.
Age: Approximately 20-30% of the population is under 18 and 20-30% is over 64.
Roadway Features
ILLUMINATION
Location: Street lights are located on both sides of SW 185th Ave at regular intervals and in the northwest and southeast corners of the SW
185th Ave/SW Cascade Dr intersection.
TOPOGRAPHY
Horizontal/Vertical Curvature: This segment of SW 185th Ave is relatively flat and straight.
VEGETATION
Landscaping: Street trees and other landscaping are located behind the sidewalk on both sides of SW 185th Ave. The landscaping appears to be well maintained and does not obstruct sight distance.
SIGHT DISTANCE
Stopping Sight Distance Requirements: 500 feet at the northbound approach and 480 feet at the southbound approach.
Available Sight Distance: Greater than 500 feet in both directions.
Facing south from SW Cascade Dr Facing north from SW Cascade Dr
Washington County Arterial Pedestrian Crossing Project Screening Memorandum | Site #10: SW 185th Ave at SW Cascade Dr
WASHINGTON COUNTY Page 10-3
TRAFFIC CONTROL AND SIGNAGE
Nearest Controlled Intersection/Crossing: A signalized pedestrian crossing is located at the SW 185th Ave/SW Johnson St intersection approximately 800 feet to the north.
Other considerations No other considerations have been identified at this time.
Crash History Total Crashes: A total of five crashes occurred in the site vicinity, including one that resulted in a minor injury and four that resulted in property damage only. None of the crashes involved pedestrians/bicyclists.
Pedestrian/Bicycle Volume
EXISTING PEDESTRIAN/BICYCLE VOLUMES
Study Period: 4 pedestrians, 0 bicyclists
Morning Peak Hour: 1 pedestrian, 0 bicyclists
Evening Peak Hour: 1 pedestrian, 0 bicyclists
FUTURE PEDESTRIAN/BICYCLE VOLUMES
Potential future pedestrian and bicycle volume generators include increases in population and household density, increases in public transit ridership on the corridor, and more effective local street connectivity, leading to more accessible walking and biking routes.
Aloha Tomorrow Planning is also focusing on increasing walkability and bikeability of SW Alexander St to the south, which could lead to more walking and biking as well.
Existing Vehicular Volumes, Heavy Vehicles Present, and Travel Speeds
VEHICLE VOLUMES
Daily: 26,711 (10,618 northbound, 12,317 southbound)
Morning Peak Hour: 1,670 (828 northbound, 842 southbound)
Evening Peak Hour: 1,790 (792 northbound, 998 southbound)
HEAVY VEHICLES PRESENT
Heavy Vehicle Percentage: Approximately 7.5% of all vehicles on SW
185th Ave are heavy vehicles.
TRAVEL SPEEDS
Posted Speed Limit: The posted speed limit is 45 mph.
85th Percentile Speed: The 85th percentile speed is 46 mph (46mph northbound, 45 mph southbound).
12:00
AM
2:00
AM
4:00
AM
6:00
AM
8:00
AM
10:00
AM
12:00
PM
2:00
PM
4:00
PM
6:00
PM
8:00
PM
10:00
PM
V e h ic le s p e r H o u r
Northbound Southbound
Washington County Arterial Pedestrian Crossing Project Screening Memorandum | Site #10: SW 185th Ave at SW Cascade Dr
WASHINGTON COUNTY Page 10-4
Gap Analysis NCHRP Report 562 methodology was applied to the potential crossing under existing traffic conditions. This table summarizes the existing morning and evening peak hour traffic volumes at the crossing site.
Time period Morning Peak Hour Evening Peak Hour
Peds Vehs Peds Veh
Pedestrian/Vehicle Peak 1 1,670 1 1,790
Assessment of the traffic volumes shown above indicates that an enhanced crossing is NOT supported under the methodology under existing conditions. Attachment G contains the analysis worksheets.
However, based on the potential increase in pedestrian/bicycle generators, the crossing will likely attract and exceed the minimum number of pedestrians needed to justify an enhanced crossing.
Sensitivity Analysis (Future Conditions): The results of the sensitivity analysis indicate that an enhanced crossing with “red” crossing treatments can accommodate up to 92 pedestrians/bicyclists and more than 2,148 vehicles (or 20% growth) during the peak time period before justifying a higher level of treatment.
Recommendations Near-term: Monitor traffic conditions in the site vicinity to determine if/when pedestrian/bicycle activity justifies an enhanced crossing.
Long-Term: Install an enhanced crossing on the north and south legs of the SW 185th Ave/SW Cascade Dr Intersection. The types of crossing treatments include:
» PHBs mounted overhead at the north and south legs of the intersection
» High visibility pavement markings across the north and south legs of the intersection per the MUTCD
» High visibility signs along the south- and northbound approaches of the intersection per the MUTCD
» ADA-compliant pedestrian ramps at both ends of the crosswalks per County standards
» Evaluate light levels at the crossing and relocate or install new street lighting as appropriate
Figure 10-1 illustrates an enhanced crossing at the SW 185th Ave/ SW
Cascade Dr intersection with the long-term recommendations.
Screening and Prioritization Land Use: The combination of residential land uses and transit stops on both sides of the roadway indicates that an enhanced crossing would moderately support adjacent land uses.
Safety: SW 185th Ave is a five-lane street with relatively high traffic volumes and travel speeds. Therefore, an enhanced crossing would improve safety for pedestrians/bicyclists.
Social Equity: A relatively high percentage of residents are under the poverty line and/or are minorities; therefore, an enhanced crossing would promote social equity.
Connectivity: SW 185th Ave is an arterial and is designated as a truck route, a pedestrian parkway, and an enhanced major street bikeway.
Also, the nearest controlled intersection/pedestrian crossing is located less than 1/4 mile to the north. Therefore, an enhanced crossing would moderately improve connectivity.
Proposed Crossing Land Use Safety Social Equity Connectivity
SW Cascade Dr
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Site #10: SW 185th Avenue at SW Cascade Drive: Enhanced Crossing Washington County, OR 10-1
Washington County Arterial Crossings Project November 2018
Figure
Page 10-5
R10-6
W11-2
S W
C
A S
C A
D E
D
R
W11-2
R10-6
SW 185TH AVE
STOP BAR
NEW CONTINENTAL
CROSSWALK STRIPING
STOP BAR
NEW SIDEWALK RAMP (TYP.)
R10-23
R10-23
PEDESTRIAN
HYBRID
SIGNAL (TYP.)
(Two sides)
W16-7PL
(W16-7PR)
W16-7PL
W11-2
W16-7PL
W11-2
(Two sides)
W16-7PL
(W16-7PR)
7409 SW Tech Center Dr, Ste B150 Location: SW 185th Ave & SW Cascade Dr
Tigard, OR 97224 Date: 5/16/2017
971-223-0003 Sitecode: 14418724 www.qualitycounts.net
Pedestrians Bikes Pedestrians Bikes Pedestrians Bikes Pedestrians Bikes
6:30 AM 0 0 0 0 0 0 0 0
6:35 AM 0 0 0 0 0 0 0 0
6:40 AM 0 0 0 0 1 0 1 0
6:45 AM 0 0 0 0 0 0 0 0
6:50 AM 0 0 0 0 0 0 2 0
6:55 AM 0 0 0 0 0 0 0 0
7:00 AM 0 0 0 0 0 0 0 0
7:05 AM 0 0 0 0 0 0 0 0
7:10 AM 0 0 0 0 0 0 0 1
7:15 AM 0 0 0 0 0 0 0 0
7:20 AM 0 0 1 0 0 0 0 0
7:25 AM 0 0 0 0 0 0 1 0
7:30 AM 0 0 0 0 0 0 0 0
7:35 AM 0 0 0 0 0 0 0 0
7:40 AM 0 0 0 0 0 0 0 0
7:45 AM 0 0 0 0 0 0 0 0
7:50 AM 0 0 0 1 0 0 1 0
7:55 AM 0 0 0 0 0 0 0 0
8:00 AM 0 0 1 0 0 0 0 0
8:05 AM 0 0 0 0 0 0 0 0
8:10 AM 0 0 0 0 1 0 0 0
8:15 AM 0 0 0 0 0 0 0 0
8:20 AM 0 0 0 0 0 0 0 0
8:25 AM 0 0 0 0 0 0 0 0
8:30 AM 0 0 0 0 0 0 0 0
8:35 AM 0 0 3 0 0 0 3 0
8:40 AM 0 0 0 0 0 0 1 0
8:45 AM 0 0 0 0 0 0 0 0
8:50 AM 0 0 0 0 0 0 1 0
8:55 AM 0 0 1 0 0 0 0 0
9:00 AM 0 0 0 1 0 0 0 0
9:05 AM 0 0 0 0 0 0 0 0
9:10 AM 0 0 0 0 0 0 0 0
9:15 AM 0 0 0 0 0 0 0 0
9:20 AM 0 0 1 0 0 0 2 0
9:25 AM 0 0 0 0 0 0 1 0
Total 0 0 7 2 2 0 13 1
Pedestrians Bikes Pedestrians Bikes Pedestrians Bikes Pedestrians Bikes
3:30 PM 0 0 0 0 0 0 0 0
3:35 PM 0 0 4 0 0 0 0 0
3:40 PM 0 0 1 0 0 0 1 0
3:45 PM 0 0 0 0 0 0 0 0
3:50 PM 0 0 0 0 0 0 0 0
3:55 PM 0 0 0 0 0 0 0 0
4:00 PM 0 0 0 0 0 0 0 0
4:05 PM 0 0 3 1 0 0 0 0
Southbound Crosswalk Westbound Crosswalk Northbound Crosswalk Eastbound Crosswalk
4:10 PM 0 0 0 1 0 0 0 0
4:15 PM 0 0 1 0 0 0 0 0
4:20 PM 0 0 0 0 0 0 1 0
4:25 PM 0 0 0 0 0 0 0 0
4:30 PM 0 0 0 0 0 0 1 0
4:35 PM 0 0 0 0 0 0 0 0
4:40 PM 0 0 0 1 0 0 0 0
4:45 PM 0 0 0 1 0 0 1 0
4:50 PM 0 0 0 0 0 0 0 0
4:55 PM 1 0 0 1 0 0 1 0
5:00 PM 0 0 1 0 0 0 0 0
5:05 PM 0 0 0 0 0 0 1 0
5:10 PM 0 0 0 2 0 0 0 0
5:15 PM 0 0 0 0 0 0 0 0
5:20 PM 0 0 0 0 0 0 1 0
5:25 PM 0 0 0 0 0 0 0 0
5:30 PM 0 0 0 0 0 0 0 0
5:35 PM 0 0 0 0 0 0 0 0
5:40 PM 0 0 0 0 0 0 0 0
5:45 PM 1 0 1 0 0 0 1 0
5:50 PM 0 0 0 0 0 0 1 0
5:55 PM 0 0 0 0 0 0 0 0
6:00 PM 0 0 0 0 0 0 0 0
6:05 PM 0 0 0 0 0 0 0 0
6:10 PM 0 0 0 0 0 0 0 0
6:15 PM 0 0 0 0 0 0 1 0
6:20 PM 0 0 0 0 0 0 0 0
6:25 PM 0 0 0 0 0 0 0 0
Total 2 0 11 7 0 0 10 0
7409 SW Tech Center Dr, Ste B150 Location: SW 185th Ave & SW Cascade Dr
Tigard, OR 97224 Date: 5/16/2017
971-223-0003 Sitecode: 14418725 www.qualitycounts.net
Pedestrians Bikes Pedestrians Bikes Pedestrians Bikes Pedestrians Bikes
3:30 PM 0 0 0 0 0 0 0 0
3:35 PM 0 0 4 0 0 0 0 0
3:40 PM 0 0 1 0 0 0 1 0
3:45 PM 0 0 0 0 0 0 0 0
3:50 PM 0 0 0 0 0 0 0 0
3:55 PM 0 0 0 0 0 0 0 0
4:00 PM 0 0 0 0 0 0 0 0
4:05 PM 0 0 3 1 0 0 0 0
4:10 PM 0 0 0 1 0 0 0 0
4:15 PM 0 0 1 0 0 0 0 0
4:20 PM 0 0 0 0 0 0 1 0
4:25 PM 0 0 0 0 0 0 0 0
4:30 PM 0 0 0 0 0 0 1 0
4:35 PM 0 0 0 0 0 0 0 0
4:40 PM 0 0 0 1 0 0 0 0
4:45 PM 0 0 0 1 0 0 1 0
4:50 PM 0 0 0 0 0 0 0 0
4:55 PM 1 0 0 1 0 0 1 0
5:00 PM 0 0 1 0 0 0 0 0
5:05 PM 0 0 0 0 0 0 1 0
5:10 PM 0 0 0 2 0 0 0 0
5:15 PM 0 0 0 0 0 0 0 0
5:20 PM 0 0 0 0 0 0 1 0
5:25 PM 0 0 0 0 0 0 0 0
5:30 PM 0 0 0 0 0 0 0 0
5:35 PM 0 0 0 0 0 0 0 0
5:40 PM 0 0 0 0 0 0 0 0
5:45 PM 1 0 1 0 0 0 1 0
5:50 PM 0 0 0 0 0 0 1 0
5:55 PM 0 0 0 0 0 0 0 0
6:00 PM 0 0 0 0 0 0 0 0
6:05 PM 0 0 0 0 0 0 0 0
6:10 PM 0 0 0 0 0 0 0 0
6:15 PM 0 0 0 0 0 0 1 0
6:20 PM 0 0 0 0 0 0 0 0
6:25 PM 0 0 0 0 0 0 0 0
Total 2 0 11 7 0 0 10 0
Key Blue fields contain descriptive information.
Analyst Major Street
Analysis Date Minor Street or Location
Data Collection Date Peak Hour
1a 46
1b NO
2a 92
Result:
3a 2,148
3b 93
3c 93
3d NO
3e 0%
3f 93
Result:
4a 74
4b 3.5
4c 3
4d 24
4f 0.85
4g 961444573
4h 24570250.2
5a LOW
Analyst and Site Information
Step 1: Select worksheet:
SW 185th Avenue
Sensitivity Analysis
SW Cascade Drive
Kittelson & Associates, Inc
June 14, 2017
May 16, 2017
Expected motorist compliance at pedestrian crossings in region: enter HIGH for High Compliance or LOW for Low
Compliance
GUIDELINES FOR PEDESTRIAN CROSSING TREATMENTS
This spreadsheet combines Worksheet 1 and Worksheet 2 (Appendix A, pages 69-70) of TCRP Report 112/NCHRP Report 562
(Improving Pedestrian Safety at Unsignalized Intersections ) into an electronic format. This spreadsheet should be used in conjunction with, and not independent of, Appendix A documentation.
This spreadsheet is still under development, please inform TTI if errors are identified.
Green fields are required and must be completed.
Gray fields are automatically calculated and should not be edited.
Tan fields are adjustments that are filled out only under certain conditions (follow instructions to the left of the cell).
[Calculated automatically] Minimum required peak hour pedestrian volume to meet traffic signal warrant
Posted or statutory speed limit (or 85th percentile speed) on the major street (mph)
Major road flow rate (veh/s), v
Treatment Category: RED
Step 5: Select treatment based up on total pedestrian delay and expected motorist compliance.
Total pedestrian delay (h), Dp The value in 4h is the calculated estimated delay for all pedestrians crossing the major roadway without a crossing treatment (assumes 0% compliance). If the actual total pedestrian delay has been measured at the site, that value can be entered in 4i to replace the calculated value in 4h.
Is the population of the surrounding area <10,000? (enter YES or NO )
Pedestrian walking speed (ft/s), Sp (suggested speed = 3.5 ft/s)
Pedestrian start-up time and end clearance time (s), ts (suggested start-up time = 3 sec)
Step 2: Does the crossing meet minimum pedestrian volumes to be considered for a traffic control device?
Step 3: Does the crossing meet the pedestrian warrant for a traffic signal?
[Calculated automatically] Preliminary (before min. threshold) peak hour pedestrian volume to meet warrant
(1.1 m/s), then reduce 3c by up to 50%.
Go to step 3.
Peak-hour pedestrian volume (ped/h), Vp
Is 15th percentile crossing speed of pedestrians less than 3.5 ft/s (1.1 m/s)? (enter YES or NO )
Major road volume, total of both approaches during peak hour (veh/h), Vmaj-s
Average pedestrian delay (s/person), dp
[Calculated automatically] Critical gap required for crossing pedestrian (s), tc
If 15th percentile crossing speed of pedestrians is less than 3.5 ft/s % rate of reduction for 3c (up to 50%)
Reduced value or 3c The signal warrant is not met. Go to step 4.
Step 4: Estimate pedestrian delay.
Pedestrian crossing distance, curb to curb (ft), L
The intersection of pedestrian volume and vehicle volume cannot be seen because the vehicle volume exceeds the limits of the graph.
This worksheet provides general recommendations on pedestrian crossing treatments to consider at unsignalized intersections; in all cases, engineering judgment should be used in selecting a specific treatment for installation. This worksheet does not apply to school crossings.
In addition to the results provided by this worksheet, users should consider whether a pedestrian treatment could present an increased safety risk to pedestrians, such as where there is poor sight distance, complex geometrics, or nearby traffic signals.
4e Major road volume, total both approaches OR approach being crossed if raised median island is present, during peak hour (veh/h), Vmaj-d
4i
1 300 600 900 1200 1500 1800 2100
P e d e s tr ia n
V o lu m e C ro s s in g M a jo r R o a d
(p e d
/h
Major Road Volume (veh/h)
No Treatment Crosswalk Active/Enhanced Red Signal (proposed)
Spreadsheet developed by
Texas Transportation Institute Printed 7/26/2017
PED-CROSSING v 0.5
(Released August 2007)
Key Blue fields contain descriptive information.
Analyst Major Street
Analysis Date Minor Street or Location
Data Collection Date Peak Hour
1a 39
1b NO
2a 12
Result:
3a 1,385
3b 93
3c 93
3d NO
3e 0%
3f 93
Result:
4a 74
4b 3.5
4c 3
4d 24
4f 0.55
4g 1062764
4h 3542.5
5a LOW
This worksheet provides general recommendations on pedestrian crossing treatments to consider at unsignalized intersections; in all cases, engineering judgment should be used in selecting a specific treatment for installation. This worksheet does not apply to school crossings.
In addition to the results provided by this worksheet, users should consider whether a pedestrian treatment could present an increased safety risk to pedestrians, such as where there is poor sight distance, complex geometrics, or nearby traffic signals.
4e Major road volume, total both approaches OR approach being crossed if raised median island is present, during peak hour (veh/h), Vmaj-d
4i
Average pedestrian delay (s/person), dp
[Calculated automatically] Critical gap required for crossing pedestrian (s), tc
If 15th percentile crossing speed of pedestrians is less than 3.5 ft/s % rate of reduction for 3c (up to 50%)
Reduced value or 3c
Step 4: Estimate pedestrian delay.
Pedestrian crossing distance, curb to curb (ft), L
Pedestrian walking speed (ft/s), Sp (suggested speed = 3.5 ft/s)
Pedestrian start-up time and end clearance time (s), ts (suggested start-up time = 3 sec)
Step 2: Does the crossing meet minimum pedestrian volumes to be considered for a traffic control device?
Step 3: Does the crossing meet the pedestrian warrant for a traffic signal?
[Calculated automatically] Preliminary (before min. threshold) peak hour pedestrian volume to meet warrant
(1.1 m/s), then reduce 3c by up to 50%.
Consider raised median islands, curb extensions, traffic calming, etc. as feasible.
Peak-hour pedestrian volume (ped/h), Vp
Is 15th percentile crossing speed of pedestrians less than 3.5 ft/s (1.1 m/s)? (enter YES or NO )
Major road volume, total of both approaches during peak hour (veh/h), Vmaj-s
[Calculated automatically] Minimum required peak hour pedestrian volume to meet traffic signal warrant
Posted or statutory speed limit (or 85th percentile speed) on the major street (mph)
Major road flow rate (veh/s), v
Treatment Category:
Consider raised median islands, curb extensions, traffic calming, etc. as feasible.
Step 5: Select treatment based up on total pedestrian delay and expected motorist compliance.
Total pedestrian delay (h), Dp The value in 4h is the calculated estimated delay for all pedestrians crossing the major roadway without a crossing treatment (assumes 0% compliance). If the actual total pedestrian delay has been measured at the site, that value can be entered in 4i to replace the calculated value in 4h.
Is the population of the surrounding area <10,000? (enter YES or NO )
Expected motorist compliance at pedestrian crossings in region: enter HIGH for High Compliance or LOW for Low
Compliance
GUIDELINES FOR PEDESTRIAN CROSSING TREATMENTS
This spreadsheet combines Worksheet 1 and Worksheet 2 (Appendix A, pages 69-70) of TCRP Report 112/NCHRP Report 562
(Improving Pedestrian Safety at Unsignalized Intersections ) into an electronic format. This spreadsheet should be used in conjunction with, and not independent of, Appendix A documentation.
This spreadsheet is still under development, please inform TTI if errors are identified.
Green fields are required and must be completed.
Gray fields are automatically calculated and should not be edited.
Tan fields are adjustments that are filled out only under certain conditions (follow instructions to the left of the cell).
Analyst and Site Information
Step 1: Select worksheet:
SW 185th Avenue
7:00 AM (Pedestrian and Vehicle Peak)
SW Blanton Road
Kittelson & Associates, Inc
June 13, 2017
May 16, 2017
1 300 600 900 1200 1500 1800 2100
P e d e s tr ia n
V o lu m e C ro s s in g
M a jo r R o a d p e d
/h
Major Road Volume (veh/h)
No Treatment Crosswalk Active/Enhanced Red Signal (proposed)
Spreadsheet developed by
Texas Transportation Institute Printed 6/22/2017
PED-CROSSING v 0.5
(Released August 2007)
File details come from the government source that posted it. Updated .