Traffic Engineering

Glendale Boulevard/Hyperion Avenue Complex of Bridges Traffic Study | Los Angeles, CA

City of Los Angeles


Traffic Engineering
Transportation Planning Services

Improving Safety and Traffic on Historic Bridge Complex

Built in the early 1930s, the Glendale Boulevard-Hyperion Avenue Complex of Bridges no longer meets seismic codes and may collapse during an earthquake event. In addition to preserving and restoring the complex of bridges—considered a City of Los Angeles historic monument and listed on the State Historic Register—the city intends to improve traffic safety and operations, as well as promote pedestrian safety, accessibility to the neighborhood community, and enhancement of the river environment.

Improvements include widening the Glendale Boulevard bridges, realigning the I-5 northbound off-ramp, adding a median barrier on the Hyperion Avenue Viaduct, and improving pedestrian facilities.

Psomas was retained to provide comprehensive traffic engineering and transportation planning services in association with this retrofit. Items addressed include vehicular and pedestrian traffic demands, posted speeds, traffic calming measures, median barrier, crosswalk locations, and alternative layouts. Services included presentation to the Citizen Advisory Council representing the neighborhood community, extensive coordination with Los Angeles Department of Transportation, and consultation with the Los Angeles Police Department.