VIDEO: Here's what to expect during Richmond-San Rafael Bridge closure

SAN RAFAEL,Calif. (KGO) -- The Richmond-San Rafael Bridge is closed due to falling concrete chunks... again.

One lane was reopened in both directions after happened earlier this morning. Then - more falling debris.

Drivers who heard a lane was back open are now stuck and unable to access the bridge, and traffic is piling up across the Bay Area as commuters seek alternate routes home.

VIDEO: Here's where concrete chunks on Richmond-San Rafael Bridge came from, fell

For example, Highway 37 is moving at a pace of about 2-5 mph.

Traffic throughout Marin is practically at a standstill, according to San Rafael Police:

The issue may get worse for tomorrow morning's commute.

So what next? Watch the video above for a look at what the CHP and ABC7 traffic experts say.

Take a look at full coverage on the Richmond-San Rafael Bridge closure due to falling concrete.