Frequently Asked Questions - Washington State Department ... www.wsdot.wa.gov/Traffic/Passes/NorthCascades/FAQ.htm#8; www.wsdot.wa.gov/Traffic/Passes/NorthCascades/FAQ.htm#8; www.wsdot.wa.gov/Traffic/Passes/NorthCascades/FAQ.htm#8; legal to bike SR 20 - North Cascades Highway - Frequently Asked Questions www.wsdot.wa.gov/Traffic/Passes/NorthCascades/FAQ.htm#8; www.wsdot.wa.gov/Traffic/Passes/NorthCascades/FAQ.htm#8;