Skip to main content

Transportation Final 10-15-11 -   1.1.b - Run Off The Road Fatalities and Serious Injuries

 
Go Search
       
Transportation Final 10-15-11
1. Safety
2. Preservation
3. Mobility
4. Ferries
5. Stewardship
Action Plan
  
 
 

1.1.b - Number of Traffic Fatalities and Serious Injuries Involving Run Off The Road
What is being done to reduce fatalities and serious injuries involving run off the road?

 
 
 
Progress icon Operation in progress...
 
Data Notes

Data Source:

Same data source as main measure 1.1 - Fatalities on All Washington roads
Notes: (optional)
Also Available
Action Plan: No
Extended Analysis: Yes

 Summary Analysis

Enforcement: Run off the Road collision data is difficult to obtain because there are a combination of causal factors including speed and DUI.  WSP uses POPS philosophy to identify problem areas and works in partnership with WSDOT to address engineering concerns.

Engineering:

43% of all fatalities (1149) in our state between 2006 and 2010 involved a run-off-the-road collision.  82% (942) of those fatalities involved impaired driving, speeding, or both.

Run-off-the-road collisions are nearly three times as likely to involve a fatality as a non-run-off-the-road collision, and half again as likely to result in a serious injury.

While our partners work hard to address behavioral issues such as speeding and impairment, not all drivers can be intercepted prior to a serious behavior-related collision.

Barriers and rumble strips represent our last possible opportunity to intervene in a collision and potentially save someone’s life, or prevent a serious injury.

Centerline Cross-over statistics

  • As of July 2011, WSDOT has installed 2,205 miles of centerline rumble strips on two-lane highways, with an additional 325 miles under current contracts for installation. When these contracts are complete, WSDOT will have covered approximately one-half of all miles of the two lane highway system that were initially identified as candidates for this safety feature.
  • Before and After analysis on 493 miles of two-lane highway from 2002 – 2009, exhibited a reduction (in targeted crashes) of 44.5% for all severity crashes and 48.6% for fatal and serious crashes.
    • An overall reduction of run-off-the-road to the right collision types by 6.8% for all severities and 19.5% for fatal and serious collisions.
    • An overall reduction of lane departure collision types by 24.8% for all severities and 37.7% for fatal and serious collisions.
  • Before and After analysis on centerline rumble strips for SR 97 corridor resulted in a reduction of 40% in all severity collisions, and 28% reduction in fatal and serious injury collisions.