Southwest Washington Regional Transportation Council

Interstate Bridge (I-5) Capacity
During Trunnion Repair Project

The following graphs show the expected hourly capacity during the I-5 Bridge closure plotted against typical traffic volumes for that time of year. The plotted traffic volumes represent an average Wednesday during October 1996. It is expected that reversing the middle lane, by shifting the movable "zipper" barrier, will require about 30 minutes.
Southbound Capacity
Northbound Capacity
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Last modified: July 15, 1997