Highway Safety Priority Act

Highway Safety Priority Act - Amends Federal aid highway provisions to: (1) require highway plans, specifications, and estimates to include the use of full-width lanes and shoulders; (2) require National Highway System design criteria to include the use of full-width lanes and shoulders to enhance highway and bridge safety; (3) require State highway laws to ensure appropriate roadside safety improvements, lane and shoulder widening, alignment and sight improvements, and conspicuous traffic control devices and pavement markings; (4) require a State highway certification to include standards that preserve and enhance the safety and mobility of highway users; (5) give priority to projects that improve safety while reducing congestion; and (6) require metropolitan transportation planning to include the maximization of safety and the need to prevent and reduce the frequency and severity of accidents involving rail and road users.