I-880 is a major corridor in California’s Bay Area region, connecting the Port of Oakland with Silicon Valley. High traffic volumes, nonstandard geometry, nonstandard interchange spacing and short weaving all contributed to the deficient flow of traffic and high accident rates in the vicinity of the 23rd Avenue and 29th Avenue interchanges.
Major project stakeholders included the California Department of Transportation, Alameda County Transportation Commission and the City of Oakland. To improve safety and operations at the interchanges, a five-stage plan was executed that included:
The finished project includes ramp and intersection modifications and reconstruction, overcrossing structure replacements and construction of a new soundwall and re-directs regional traffic out of the neighborhood. The final structures better connect the cities of Alameda and Oakland and can now be used by school children within the Jingletown neighborhood, motorists, pedestrians and bicyclists.
This project has received the following industry recognition:
"Notably, this project included the first roundabout at an on-ramp in the Bay Area, which has opened new possibilities and proven that the roundabout option is viable. Future projects will draw upon these key learnings and continue to provide value to the engineering profession."
Associate Vice President and Public Works Operations Manager
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