RRC Corridor Prioritization

Prioritize

State Routes Corridors

for Active Transportation Investment

A data-driven prioritization framework for pedestrian and bicycle infrastructure planning

🗄️

Saved Dataset

You may use the pre-saved data by selecting in the dropdown below

Select Dataset Profile

✅ Profile loaded — field mappings applied

OR UPLOAD YOUR OWN FILES

Corridors

⏳

▸

Road Segments

⏳

▸

🛤️

Drop segment shapefile

.shp or .zip

Optional — segment detail panel hidden if not uploaded

📋 Field Mapping — 18 column names Click to expand ▸

Segment attribute fields

Trip count field Segment_trip_count

Parcel count field Segment_used_by_parcels

Segment length field Shape_Le_1

⑵ Facility flags (pre-joined columns in segment shapefile)

Facility	Presence field (Y/N)	Length / Count field(s)	Key attribute field(s)
🛣️ Shoulder
🚶 Sidewalk
🚲 Bike path
🚦 Crosswalk

Road characteristics & Traffic

Speed limit field Speed_Limi

AADT field AADT

Traffic direction field Traffic_Di

Residential Parcels

⏳

▸

✓

Data Inputs

Complete

Weights & Run

Configure & run analysis

⚖ Scoring Weights

Travel Demand

30%

▸ Sub-weights

Trip Count 60%

Parcel Count 40%

✓ 100%

Infrastructure Gap

25%

▸ Sub-weights

Shoulder Gap 34%

Sidewalk Gap 33%

Bike Path Gap 33%

✓ 100%

Safety

30%

▸ Sub-weights

Exposure Blend

Traffic Volume (AADT) 25%

Speed Limit Risk 15%

Crash History 60%

Crash Frequency 40%

Fatality Proportion 30%

Serious Injury Proportion 20%

Evident Injury Proportion 10%

✓ 100%

✓ Weights sum to 100% · S1 = 30% · S2 = 25% · S3 = 30% · S4 = 15%

▶ Review & Run

Sociodemographics

15%

▸ Sub-weights

Need Index Blend

Poverty Rate 30%

Zero-Car Households 25%

Unemployment 15%

Age 65+ 15%

Age 5–17 15%

✓ 100%

Running Analysis…

Uploading files and processing data

🌲 Washington State Department of Transportation · Rural Residential Clusters Program

📋 About This Tool

The RRC Corridor Prioritization Tool is a web-based application for comparing and ranking roadway corridors for active transportation improvements. It uses corridor, roadway segment, and residential parcel data to calculate a priority score for each corridor.

The tool is intended to support planning-level screening. It helps users compare many corridors using the same set of measures and selected weights. The results can be used to identify corridors for further review, field assessment, project scoping, or inclusion in a planning process.

🗂 Three Input Files

Corridor layer (Line) — Contains one record for each full corridor being evaluated.
Segment layer (Line) — Contains the roadway sections that make up each corridor. Infrastructure, crash, traffic, and speed data are stored or summarized at this level.
Residential parcel layer (Polygon) — Contains residential parcels associated with the corridors. It supports parcel counts and socio-demographic scoring.

🔢 Composite Score Formula

Final Score = w₁ × S1 + w₂ × S2 + w₃ × S3 + w₄ × S4

Defaults: w1=30% · w2=25% · w3=30% · w4=15%. All stage scores normalised to 0–100. Tiers (HIGH / MEDIUM / LOW) assigned at 33/67 thresholds.

⚙ Four-Stage Scoring Framework

Travel Demand & Dependency

Default 30%

Measures how heavily a corridor is used by rural residential parcels — combining trip count and parcel count from the Corridor shapefile.

Trip count 60% · Parcel count 40%

Infrastructure Gap

Default 25%

Length-weighted gap ratio across shoulder, sidewalk, and bike path facilities from the Road Segment shapefile. Higher score = more missing infrastructure.

Shoulder gap 33% · Sidewalk gap 33% · Bike path gap 33%

Safety — Crash History & Exposure

Default 30%

Combines crash history (frequency, fatalities, injuries) with traffic exposure (AADT) and speed risk. Corridors with zero crashes still score based on AADT and speed limit.

Crash history 60% · AADT exposure 25% · Speed limit risk 15%

Sociodemographics

Default 15%

Stage 4 scores corridors using the Sandy-Williams Equity Need Index — a composite measure of sociodemographic vulnerability developed by WSDOT for the Connecting Communities Pilot Program. The index is computed per Census Block Group and averaged across all residential parcels served by each corridor.

Source: Sandy-Williams Equity Need Index (WSDOT) · Averaged across CBGs per corridor · Normalised 0–100

📄 Read more — User Manual ↗

🗺️

RRC Guide

Active Transportation Tool Assistant