Matching this map with the nice picture in Post #8 above, it looks like the ramp connecting 80 westbound to 880 southbound collapsed onto the ramp connecting 80 eastbound to 580 westbound.
This is relatively good news.
The bottom ramp, 80 east to 580 west, should be able to be reopened fairly soon, I would hope, once the debris is cleared away, if it did not suffer serious structural damage. This ramp is the major evening traffic flow for commuters returning from San Francisco to much of the east bay (Oakland and most of Alameda county).
The top ramp is a flaming disaster and no doubt will take months to rebuild. But it is one of the least traveled paths through this maze, for travelers going south along the east side of the Bay, from Berkeley and points north, to Hayward and Fremont and points south. And the 980 freeway, a few miles to the east, can offload much of this traffic.
But for the next few weeks, until the 80 east to 580 east ramp is cleared, the evening commute out of San Francisco is going to be a bitch.
Matching this map with the nice picture in Post #8 above, it looks like the ramp connecting 80 westbound to 880 southbound collapsed onto the ramp connecting 80 eastbound to 580 westbound.Wrong.This is relatively good news.
The bottom ramp, 80 east to 580 west, should be able to be reopened fairly soon,...
Looking again at the close up Google map The Maze, it seems obvious that the top ramp, the one that will take months to rebuild, is the one for traffic coming on Interstate 80 East over the Bay Bridge (from San Francisco) and going to Interstate 580 East (to most of the East Bay.)
The petro trucks from the Richmond refineries to the north, traveling on Interstate 880 south to most of the Bay Area, should have their section back as soon as they clear the collapsed overpass rubble.
But the evening commute out of San Francisco is going to suck big time for months, in all directions.