Niles Boulevard Bridge Replacement

Niles Boulevard
Monday – Friday: 7:30 a.m. – 4:00 p.m.
Saturday: 9:00 a.m. – 5:00 p.m. (if needed)


The Niles Boulevard Bridge spans over the Union Pacific Railroad (UPRR) and BART tracks at the Fremont/Union City border. Following the Loma Prieta earthquake, the bridge was identified by Caltrans for seismic retrofit. Due to high construction costs, long closures of the existing bridge, and limited night time construction hours while BART is not operating, it was subsequently determined the bridge should be replaced rather than retrofitted. 

Viking Construction Company will construct the new bridge. On-site construction activities started in October, 2015 and are anticipated to be complete spring 2017. The new bridge will be constructed immediately south of the existing bridge. 

Niles Bridge


The new bridge will provide:

  • Enhanced seismic reliability, preventing the potential for catastrophic failure during a seismic event that could shut down BART and UPRR service for months.
  • Enhanced connectivity for motorists, pedestrians and bicyclists travelling between Union City and Fremont.
  • Pedestrian and Bicycle improvements including landscaped embankments, an improved sidewalk on the south side of the bridge, and bicycle lanes in both directions.

A new cast-in-place, pre-stressed concrete box girder bridge will be built next to the existing bridge, allowing it to remain open during construction. The existing bridge will be demolished once the new bridge is complete, providing for a more cost-effective solution that requires minimal traffic disruption during construction.

The total project cost of the new bridge is approximately $11 million. The construction costs are funded by the federal Highway Bridge Program (HBP), with matching funds coming from state Prop 1B funds.


  • BART protective cover removal is complete. No additional night work activities are planned for the remainder of the project.
  • Traffic alignment and permanent striping are anticipated to continue through the week of February 26.


If you have any questions regarding the project, please contact:
Jeanne Suyeishi
ph: 510-494-4728