Vancouver region State Route 500 - Throughput
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Measures of throughput productivity on SR 500 in the Vancouver area
Throughput productivity
Throughput productivity measures how efficiently existing highway capacity is being used. It can be reported for vehicles or travelers, making it a very adaptive metric. WSDOT uses the maximum throughput standard to assess travel delay relative to a highway's most efficient speed, which is 85% of the posted speed limit.
Lost throughput productivity is the percentage change of highway throughput in respect to maximum throughput due to congestion and other events that cause vehicles to travel below a threshold speed. Refer to WSDOT's how to calculate throughput productivity (PDF 5.9MB).
In order to gauge the lost productivity on SR 500 in the Vancouver region, WSDOT analyzed vehicle throughput at three locations: At Saint Johns Boulevard (MP 1.0), near Andresen Road (MP 3.5), and near Fourth Plain Boulevard (MP 5.0).
Sources: WSDOT Transportation Safety and Systems Analysis Division and WSDOT TRACFLOW (https://tracflow.wsdot.wa.gov/)
Performance highlights
In 2023, there were no significant changes in throughput productivity compared to 2022: There was no throughput productivity loss at SR 500 near Saint Jonhs Blvd, Andresen Rd and Fourth Plain Blvd in either direction throughout the day.
In 2022, there were no significant changes in throughput productivity compared to 2021: There was no throughput productivity loss at SR 500 near Saint Jonhs Boulevard, Andresen Rd and Fourth Plain Blvd in either direction throughout the day.
In 2021, there were no significant changes in throughput productivity compared to 2020: There was no throughput productivity loss at SR 500 near Saint Jonhs Boulevard, Andresen Rd and Fourth Plain Blvd in either direction throughout the day.
In 2020, there were no significant changes in throughput productivity compared to 2019: There was no throughput productivity loss at SR 500 near Saint Johns Boulevard, Andresen Rd and Fourth Plain Blvd in either direction throughout the day.
In 2019, there was no throughput productivity loss at SR 500 near Saint Johns Boulevard, Andresen Rd and Fourth Plain Blvd in either direction throughout the day.