SAN FRANCISCO (KRON) — All lanes are open again after a traffic collision on westbound I-80 east of Fremont Street in San Francisco snarled traffic earlier. Residual delays are expected, according to 511 SF Bay, further complicating a morning commute already impacted by rainy conditions.

The collision is adding to wet-weather commuter woes with BART service also disrupted in San Francisco due to a downed tree on the tracks.

This is a developing story. Check back for updates.