With business access directly off the highway and unrestricted left-turn movements, a igh number of crashes had been documented on State Route 68 corridor transecting Golden Valley, Arizona. Due to the safety concerns with the three-mile corridor, design and construction of a raised median was funded through the Federal Highway Safety Improvement Plan (HSIP). Matrix reviewed crash data for the corridor to determine where access locations with protected acceleration lanes within the median should be provided to allow left turns.
A raised median presented challenges on a highspeed facility, with the face of the curb having to meet maximum slope and upper curb radius measures to ensure compliance with AASHTO and Arizona Department of Transportation (ADOT) Roadway Design Guidelines. Matrix led extensive coordination with ADOT Roadway, ADOT Northwest District, and Mohave County to achieve a safe, cost-effective, and compliant solution. Ultimately, the construction of the raised median utilized an extruded pinned curb that allowed for quick and safe construction while limiting the overall project cost.