High-Crash Locations

Welcome!

Welcome to the central Puget Sound region Tribal Areas’ High-Crash Location (HCL) Dashboard - a tool to help communities better understand roadway safety within Tribal boundaries.

Developed for the Puget Sound Regional Council (PSRC) by WSP USA.

Tabs Overview

HCL Map

Explore Fatality & Serious Injury Locations by Tribal areas. Use filters, hover, or click on map features to see more details.

Data Center

View crash summaries for each Tribal area, including the collision types and contributing factors.
Explore suggested countermeasures drawn from the RSAP Strategies Toolbox.
Use interactive tools to filter, explore, and download tables for analysis or reporting purposes.

What you can do with this Dashboard

This dashboard helps you explore and understand crash hot-spots within Tribal boundaries.

See where Fatality & Serious Injury Locations are on an interactive map.
Learn about the most common crash factors and collision types.
View design and engineering countermeasures suggested by the Regional Safety Action Plan (RSAP) Strategies Toolbox to address safety issues.

How to use this Dashboard

The dashboard is organized into easy-to-navigate tabs. Each tab has tools to explore maps and tables that respond to your input. You can click, hover, or filter to see details that matter to you. All maps and tables are interactive and allow you to download data directly.

Tribal Areas

Tribes are sovereign nations, and each Tribe has its own government with its own governing charter or constitution and set of general laws. The federal government currently recognizes nine Tribal nations in the PSRC region: Muckleshoot, Nisqually, Port Gamble S’Klallam, Puyallup, Sauk-Suiattle, Snoqualmie, Stillaguamish, Suquamish, and Tulalip. However, the Nisqually Indian Tribe spans both Thurston and Pierce counties, and the Sauk-Suiattle Indian Tribe spans Skagit and Snohomish counties. Based on the state-of-the-practice review conducted for each Tribe, no reportable crashes were identified within the PSRC portion of the Nisqually and Sauk-Suiattle Tribal area territories between 2017 and 2024. Additionally, conversations with regional planning organizations (Thurston Regional Planning Council and Skagit Council of Governments) indicated those Tribal areas of the Nisqually and Sauk-Suiattle have more roadways and essentially all serious injury crashes in those counties outside the central Puget Sound region. Accordingly, these two Tribes are excluded from the present analysis but will be addressed in the Skagit Council of Governments and Thurston Regional Planning Council Safety Action Plans.

Disclaimer

Under 23 U.S. Code § 148 and 23 U.S. Code § 407, safety data, reports, surveys, schedules, lists compiled or collected for the purpose of identifying, evaluating, or planning the safety enhancement of potential crash sites, hazardous roadway conditions, or railway-highway crossings are not subject to discovery or admitted into evidence in a federal or state court proceeding or considered for other purposes in any action for damages arising from any occurrence at a location mentioned or addressed in such reports, surveys, schedules, lists, or data.

Overview

This High-Crash Locations (HCL) Dashboard highlights safety concerns within Tribal areas in the PSRC region. Using crash data from 2017–2024, the map identifies hot-spot locations with frequent or severe collisions. A clustering method groups crashes that occur within 45 meters (about 148 feet) of one another, treating them as a single crash hot-spot. Suggested design and engineering countermeasures from the RSAP Strategies Toolbox are also provided. A 100-meter (about 328 feet) buffer is applied to capture crashes within or near each Tribal area boundary.

Notes

Note 1: This map is for informational use only and may not reflect official Tribal area designations. Consult Tribal governments for authoritative information. This information is provided without any warranty of accuracy or reliability.

Note 2: Identified countermeasures have been sourced from established sources including WSDOT, the CMF Clearinghouse, and other published research, and are provided for information only. Project developers, agencies, and other users of this dashboard should conduct their own analyses based on current conditions, project limits, available funding, and other information prior to developing any programs or projects.

Abbreviations

Injury Levels	Definition
K	Fatalities
A (or SI)	Suspected Serious Injuries
B	Suspected Minor Injuries
C	Possible Minor Injuries
KSI (KA)	Fatalities and Serious Injuries
KABC	Fatalities, Serious Injuries, and Minor Injuries

How to Use This Map

The map is interactive and contains several layers you can explore:

Fatality & Serious Injury Locations
Hover over a point to see crash and fatality/injury counts. Click for more details, including a Google Maps link to the location and tables summarizing contributing factors, collision types, and the recommend countermeasures.
High-Injury Network (HIN) (within Tribal Areas vicinity)
Shows corridors with the highest concentrations of serious injuries and fatalities in the central Puget Sound region (2016–2023). Note: The map displays only the portions of the HIN located within or near Tribal Areas.
Tribal Boundaries
Click on a boundary to see crash and fatality/injury summary by Tribal areas. The detailed summary is also available in the Data Center.

Filters

Use the filters below to filter the Fatality & Serious Injury Locations layer by different attributes, helping you focus on the data most relevant to your interests.

Tribe Name Filter the locations by Tribe name

Contributing Factor Filter locations by the contributing factor reported

Collision Type Filter locations by the type of collision (e.g., rear-end, angle, sideswipe)

Countermeasure Filter locations by countermeasures, targeted to the collision types and contributing factors

Crash at Intersection Filter locations by whether they occur at intersections vs. midblock locations

Total Deaths & Serious Injuries Filter locations by the total number of people killed or seriously injured

Pedestrian/Bicyclist Deaths & Serious Injuries Filter locations by the number of pedestrian or bicyclist killed or seriously injured

Overview

The Data Center brings together key summaries of crashes and safety concerns within each Tribal area boundary. It helps you understand not only where crashes occur, but also what factors contribute to them and what countermeasures may help improve safety.

Abbreviations

Injury Levels	Definition
K	Fatalities
A (or SI)	Suspected Serious Injuries
B	Suspected Minor Injuries
C	Possible Minor Injuries
KSI (KA)	Fatalities and Serious Injuries
KABC	Fatalities, Serious Injuries, and Minor Injuries

What You’ll Find

Crash Summaries by Tribal Areas: Explore the number of crashes, collision types, and contributing factors.
Countermeasures: Review design and engineering countermeasures suggested by the RSAP Strategies Toolbox (pg. 3-15) for each Tribal area.
- Note 1: Although not mentioned in this dashboard, RSAP Strategies Toolbox also details on the planning, policy, and program strategies. See RSAP Strategies Toolbox (pg. 16-34).
- Note 2: Identified countermeasures have been sourced from established sources including WSDOT, the CMF Clearinghouse, and other published research, and are provided for information only. Project developers, agencies, and other users of this dashboard should conduct their own analyses based on current conditions, project limits, available funding, and other information prior to developing any programs or projects.
High-Injury Network (HIN) Summary by Tribal Areas: See a breakdown of HIN corridors and crash concentrations for each Tribal area (2016–2023).
Interactive Tools: Filter, explore, and download tables for your own analysis or reporting.