Excerpt:

In 15 years, 19,000 people could be living on Treasure Island, and a good portion of them will be leaving the island each morning for jobs in San Francisco and the East Bay.

They'll be less than a 10-minute drive from San Francisco - a dream commute. But if all 5,300 commuters expected to leave the island every morning get in their cars, they'll jam the already-gridlocked Bay Bridge. The line of cars trying to creep onto the span could stretch across the island.

City planners and the island's developers are convinced that a robust transit network can quickly get people off the island without them ever setting foot in their cars. But others are more skeptical, noting that each apartment or condominium on the island will have its own parking spot - meaning everyone will be tempted to get in their car every morning.