NYC subway chief faces task of fixing system without choking it

Kate Slevin, vice president for state programs and advocacy for the Regional Plan Association, said her organization has called upon city and state transit officials to adopt policies to reduce car traffic as much as possible, restricting motorists from some streets, charging tolls and making parking more scarce and expensive.

"The closing of the L train presents the opportunity to show New Yorkers how quickly you can move large numbers of people with buses, bicycles and walkways," she said. "Private automobiles are the least efficient way to move around."

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