170th Avenue/Merlo Road Conceptual Design Plan

Project Overview

StudyAreaMapWebThe 170th/Merlo corridor is a critical north-south connection between residential neighborhoods, major employment hubs, transit lines, schools and parks.  This corridor includes SW 170th Avenue between Baseline Road and Tualatin Valley Highway (TV Highway) and SW Merlo Road between 170th Avenue and Jenkins Road. 

However, this corridor is not currently serving the needs of users, including pedestrians, cyclists, vehicles and people accessing transit. Sidewalks and bike lanes are missing in many places and traffic congestion is increasing. The 170th Avenue/Merlo Road Conceptual Design Plan presents a preferred design for the corridor that welcomes all users, provides safe access to surrounding destinations and carefully considers impacts to properties and natural features. See Frequently Asked Questions (FAQ) for more information.


See list of project objectives


Latest News - Final Report Complete

The 170th Merlo Conceptual Design Plan is now complete. The Final Report and appendix A and appendices B-I are available for download at these links.


Study Process and Timeline

The development of the conceptual design plan took place over eight months, including a detailed analysis of existing conditions; a broader look at surrounding neighborhood context; an evaluation of best practices and innovative designs; and an inclusive public involvement process. This planning project concluded in June 2015.



This project was partially funded by a grant from the Transportation and Growth Management (TGM) Program, a joint program of the Oregon Department of Transportation and the Oregon Department of Land Conservation and Development. TGM grants are financed through the federal Moving Ahead for Progress in the 21st Century (MAP-21) program, local government and State of Oregon funds.



Have questions or concerns? Contact the project manager, Steve Szigethy, at 503-846-3847, or send an email to lutplan@co.washington.or.us.