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Project Details

Corridor Bottleneck Operations Study - Region 1

Planning Phase

Region 1: Portland metro and Hood River County (Clackamas, Multnomah, Washington)

ODOT’s Corridor Bottleneck Operations Study identifies key congestion locations along the five Portland metro area corridors (I‐5, I‐205, I‐84, I‐405 and U.S. 26). The study recommends projects to improve freeway safety and operations.



This ODOT study was completed in 2013 in response to the Federal Highway Administration FHWA Localized Bottleneck Reduction (LBR) program. The federal program focused on relieving bottlenecks and their causes. The ultimate goal: improving safety and operations at these bottlenecks.

The study recommends cost‐effective and small‐scale improvements to the existing system. The projects recommended are not capacity improvements. Rather, they are operational improvements such as adding auxiliary lanes between freeway interchanges.​​​



N/A | ​I‐5, I‐205, I‐84, I‐405 and U.S. 26

Additional Information

Projects were selected to provide the best value of benefits and cost (primarily projects in the $1-20 million range). Projects recommended in the Corridor Bottleneck Operations Study will alleviate congestion at identified bottlenecks, particularly during the peak commute shoulder hours, and enhance safety by improving the weaves and merges that occur at interchanges. An auxiliary lane added to eastbound Interstate 84 at Halsey Street in Portland has reduced crashes by 14 percent and cut daily delay by 10 percent, while improving afternoon peak travel time and speeds by 5 percent.

Maps & Media

The project atlas cover.

Project Contacts

Major Projects Manager
Mandy Putney

Major Projects
Mike Mason

Last Updated

7/31/2017 11:14 AM

Project Number


Project Documents

Related documents to this project
Chapter-1-CBOS.pdfThis collection of documents if the final report for the Corridor Bottleneck Operations Study. <br>This document provides a location summary, table of contents and information on how to use the project atlas.
Chapter-2-CBOS.pdfThis document provides the introduction.
Chapter-3-CBOS.pdfThis document focuses on bottlenecks and solutions.
Chapter-4-CBOS.pdfThis document provides bottlenecks and project recommendations by corridor.
Chapter-5-CBOS.pdfThis document details the appendices, which are available upon request.

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