CalTrans workers investigate a crumbled section of freeway ramp which connects Interstate 80 to Interstate 580 in Oakland, Calif., after a tanker carrying gasoline exploded on Sunday, April 29, 2007. In the resulting blaze, a section of freeway that funnels traffic onto the San Francisco-Oakland Bay Bridge collapsed. The truck's driver walked away from the scene and called a taxi, which took him to a nearby hospital with second-degree burns. (AP Photo/Ben Margot)

The threat of a nightmarish morning commute led many Bay Area residents to use public transportation Monday, one day after a fiery tanker crash caused a heavily trafficked section of freeway to collapse.

Westbound traffic into the city largely flowed as usual Monday morning, except for drivers slowing on interchange lanes headed to the Bay Bridge to look at the damage.