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U.S. 20 at Granger and Independence Road Safety Audit

 

Overview

 
In 2012, ODOT conducted a Road Safety Audit (RSA) of U.S. 20 at Granger Avenue and Independence Highway because the intersections are among the top 5% of the worst crash sites in the state. ODOT committed to studying these intersections to determine the best safety improvements to implement. 

Each year, ODOT identifies its top 5% of high crash locations on state highways in Oregon. The ranking is known as the Safety Priority Index System, or SPIS. 
 
The SPIS is a method of identifying locations where safety funds may be spent to provide the highest benefit. The SPIS is prioritized based on three years of crash data and considers crash frequency, crash rate and crash severity. 
  
 To learn more about SPIS, visit the website:
 http://www.oregon.gov/ODOT/HWY/TRAFFIC-ROADWAY/spis.shtml

Latest Activity 

U.S. 20 at Independence Highway

An intersection conflict warning system was installed in August 2016 in response to the recommendation in the RSA. We will continue to monitor the effectiveness of this system as it is one of the first installations in the Region. For more information on this system, see the summary.

 

U.S. 20 at Granger Avenue

We recently programmed funding through our transportation investment program (STIP) for a project at U.S. 20 and Granger Avenue. The current scope of work includes two key features: constructing a median acceleration lane and creating a buffered right turn lane at the intersection. The buffered turn lane is intended make it easier for vehicles turning left out of Granger Ave to see. The median acceleration lane allows vehicles turning left from a side road to gain speed and merge with main line traffic, helping drivers make safer left turns onto the highway. Both of these features were recommended in the RSA. More information is available in the draft 2018-2021 STIP.

 
Project Need
The intersections of U.S. 20 and Granger Avenue and U.S. 20 at Independence Highway have experienced a number of vehicle crashes higher or more severe than the state average for several years.  Most of these crashes are related to turning movements at the intersections.
 
At the Granger Avenue intersection, there were 41 crashes recorded in the five years prior to the audit.  Many were vehicles turning left from Granger Avenue onto U.S. 20, moving across on-coming traffic (See Crash Diagram in Library below). 
 
At Independence Highway, there have been were 23 crashes in the past five years.  Like at Granger Avenue, many were vehicles turning left from Independence Highway to U.S. 20, moving across on-coming traffic. 
 
While there have been no fatalities in recent years, there have been several serious injury crashes.

Road Safety Audit
In an effort to understand more thoroughly why the crash rate is high at the intersections, ODOT conducted the U.S. 20 at Granger and Independence Road Safety Audit. 
 
A Road Safety Audit (RSA) is a formal safety performance examination of an existing or future road or intersection by an independent, multidisciplinary team.  Our ten member RSA team studied the section of road and the two intersections from a variety of perspectives. The goal is to identify the root causes of the situation and then suggest actions. 
 
Our team is comprised of representatives from ODOT Transportation Safety, ODOT Roadway, ODOT Maintenance, Benton County, a local citizen and an ODOT consultant. 
 
The team is independent and considered all potential road users and their needs. 
 
In addition, our stakeholder group includes representatives of ODOT, the cities of Corvallis and Albany, school districts, nearby businesses, Oregon State Police, OSU, and Benton County. 
  
The RSA is an excellent tool to identify and mitigate safety concerns.  The final report includes proposed remedies to safety problems. 
 
To learn more about Road Safety Audits, visit the Federal Highway Administration’s website:  http://safety.fhwa.dot.gov/rsa/

Schedule
Field work on the U.S. 20 at Granger and Independence Road Safety Audit took place March 19, 20 and 21, 2012. 
  
A contractor for ODOT, DKS and Associates, prepared a formal report with proposed remedies in April 2012.
Library
​ 

US 20 Road Safety Audit Final Report

Addressing issues outlined in the report

US 20/Granger/Independence crash diagram  
 
Road Safety Audit Findings Presentation - April 5, 2012 
  

Contact

To receive news releases and other communications about this project, please visit:   https://public.govdelivery.com/accounts/ORDOT/subscriber/new?
and provide your email address.
 
Amanda Salyer
Region 2 Senior Traffic Investigator
503-986-5808
Email at:  Amanda.Salyer@odot.state.or.us  
  
 
Angela Beers Seydel
ODOT Public Information Officer
541-726-2442
Email at:  angela.beers-seydel@odot.state.or.us