All too often the readerboards that give information on accidents seem to slow traffic down even more.
WSDOT - I-90 - Two-Way Transit and HOV Operations - Variable Speed Limit Signs
Tried and true on our mountain passes
WSDOT uses variable speed limit signs on US 2 at Steven Pass and on I-90 at Snoqualmie Pass to alert drivers to slow down during icy, snowy and congested driving conditions. Similar signs installed on European urban roadways incresed safety and decrease congestion-related collisions by 30% or more.
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