Due to widespread opposition, it would be nearly impossible to pass the bill today, said one of its sponsors.

"Our laws should encourage safe and reasonable bicycling habits," said Sen. Scott Weiner, the bill's co-author.

BART commuters are stranded this morning, as no trains are going through the Transbay Tube.

Passengers enjoy stunning Bay views, a cocktail and snack bar — and room to stretch their legs.

Advocates are looking for 100 people who'll help measure ground-level air quality.