Another round of extensive re-engineering followed the 1989 Loma Prieta earthquake , including the addition of diamond lane ramps and a huge girder flyover connecting the relocated northbound Nimitz with the northbound Eastshore Freeway ( which is technically I-80 eastbound and I-580 westbound ) . The original 1936 ramps were removed during this 1990s construction . Reinforcements were completed in 2002
1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
MacArthur Maze