California’s First Diverging Diamond Interchange (DDI) located at SR 120 / Union Road broke ground in June 2019. This unique interchange project was scheduled for completion in March 2021, but due to COVID-19 and excellent teamwork, the Contractor (Teichert Construction) was able to reduce construction time by nearly four months and reduce the project costs by approximately $150,000. The City of Manteca will open this ingenious interchange design on November 25, 2020.
The DDI is unique in that traffic on Union Road is shifted to the left side of the road, before being shifted back to the right eliminating any left hand turns through the intersection resulting in a reduction in collisions. A simulation video designed to demonstrate how to safely navigate this diverging diamond interchange, benefits, images, and opening details are available on the project website, mantecaddi.net.
The City of Manteca is committed to delivering safe and efficient transportation facilities and improvements to the greater Manteca area.
Call the project hotline with any questions or concern and a project team member will get back to you – 209.707-3470.
