A light rail line along the existing right-of-way would ease traffic, integrate Belle Haven and other economically challenged neighborhoods into the mainstream of Silicon Valley, promote downtown Redwood City as a transit hub, and have a host of collateral economic and environmental benefits. It would also be dramatically cheaper than most transit projects.
It would supersede the once dreamed of Dumbarton Rail Connection, but that is no great loss, as this was an absurdly expensive heavy-rail-across-the-Bay project that realistically will never get built.
Whether or not light rail is the answer, it remains the case that the Dumbarton line is begging to be developed. Even a bike path along that corridor could substantially mitigate the impact of Facebook's otherwise welcome move.
Bill Kelly, Peak Lane, Portola Valley