General purpose lanes outperforming toll lanes on I-405

About the Author
Bob Pishue
Director, Coles Center for Transportation

 The Everett Herald recently reported that the I-405 toll lanes are “moving more cars per hour than their HOV predecessors.” The article says that, based on WSDOT data, the old HOV lane carried 15 percent of traffic near NE 85th Street in Kirkland, but the new toll lanes carry 25 percent.

However, that’s only 12.5 percent of vehicles per lane, far below the 15 percent of the old HOV lane. In addition, the three general purpose lanes now carry the remaining 75 percent of the traffic, 25 percent per lane, double the traffic throughput of the toll lane.

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