REGIONAL HIGH INJURY CORRIDORS
Page 5 April 2017
There are 174 intersections in the top 5%, with weighted crash scores higher than
80.
1% and 5% intersections are not split/identified by mode.
Consistency with other high crash locations
In the greater Portland area several jurisdictions have identified high crash networks or
locations, including Portland, Washington County, Clackamas County, and Hillsboro.
Additionally, ODOT and many jurisdictions use the Safety Priority Index System (SPIS) and All
Roads Transportation Safety (ARTS) program high crash locations. The regional high injury
corridors do not contradict the locations identified by these agencies, but do provide:
a regionally consistent methodology for the regional transportation network,
focus on fatal and severe crashes,
are specific to the urban region,
and identify corridors as opposed to hot spots.
4
Part of the reason the 2012 Regional Transportation Safety Plan recommended identifying high
injury corridors, as opposed to high crash locations, is that a corridor approach highlights the
roadways that have high risk factors.
Both ARTS and SPIS focus on specific locations, while the HICs identify corridors. HICs and
ARTS focus on severe crashes. SPIS captures locations where there are also high frequency and
rate of crashes, in addition to severe crashes; a roadway segment becomes a SPIS site if a
location has three or more crashes or one or more fatal crashes over the three year period. The
ARTS program identifies hotspot locations, defined as a location that has at least one fatal or
serious injury crash within the last five years. SPIS sites and ARTS hotspots overlap with the
high injury corridors and the regional high crash intersections identify high crash locations that
are not necessarily on a high injury corridor.
High Risk Corridors
Identifying corridors that have high crash risk factors (posted speed, signalized intersections,
unlit streets, number of liquor establishments, lack of medians, sidewalks, bicycle facilities,
driveway density, etc.) but do not necessarily have high concentrations of severe crashes
provides a useful for further prioritizing safety efforts. Metro is exploring availability of data,
resources, possibility of developing high risk corridors, however most corridors with identified
high risk factors will overlap with the high injury corridors. Metro reviewed the “Risk Based
Pedestrian and Bicycle Project Corridors” identified in ODOT’s Pedestrian and Bicycle Safety
4
The San Francisco analysis noted that “corridor-level and area-level analysis is necessary for efficient and
effective injury prevention.” http://www.sfhealthequity.org/images/Merged_HIC_Methods_2015.pdf