Skip Top Navigation

Research Reports

Operational Analysis of the I-405 HOV System


This report documents an operational analysis of I-405 HOV facilities. The primary objectives of this analysis were (1) to provide information that could assist in the development of a coordinated plan for the I-405 high-occupancy vehicle (HOV) lane system to ensure that the existing and planned HOV facilities worked together and that transitions between facilities occurred smoothly, and (2) to survey the I-405 commuters as a means of understanding their perceptions of HOV lane operations and constraints on the ability of single-occupant vehicle (SOV) commuters to rideshare.

The analysis included an overview of HOV lane operations in the United States, a public opinion survey of commuters who primarily lived and worked east of Lake Washington, results of focus groups with workers who lived in east King County, transportation modeling centering on the I-5 corridor, traffic analysis of HOV lane options, a cost effectiveness analysis, and the results of a symposium that presented and discussed the results of the project.

  • Date Published: April, 1992
  • Publication Number: WA-RD 238.1
  • Last Modified: October 3, 2007
  • Authors: Cy Ulberg, Kate Erickson.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 219 p., 5,796 KB (PDF)
  • Subject: Analysis, Commuters, Cost effectiveness, Data collection, Focus groups, High occupancy vehicles, High occupancy vehicle lanes, Mathematical models, Planning, Public opinion, Ridesharing, Surveys, Traffic lanes, Transportation corridors, Urban growth.
  • Keywords: HOV lanes, mode choice, public opinion, ramp metering, weaving analysis, transportation modeling, survey methodology, I-405, King County (Wash.)
  • Related Publications:

This abstract was last modified April 29, 2008