The overall goal of the project is to improve the seismic safety of the corridor . After the 1989 Loma Prieta earthquake , the California Department of Transportation ( Caltrans ) initiated Phase 1 of its seismic retrofit program . After the 1994 Northridge earthquake , Caltrans initiated Phase 2 of its seismic retrofit program , which included projects along the I-880 corridor . Other goals include reducing traffic congestion and improving road quality
1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
Interstate 880