Video | The Speed in Central Park After a woman was knocked over by a cyclist and killed, there was a lot of conversation about how to best use the park drive. The Times brought out a radar gun to get a sense of the traffic. The bicyclists come in rolling waves: speedy exercisers, slow meanderers or 13-deep packs of foreign-tongued tourists, heads craned in search of the Dakota or the towering San Remo. Beside them in precarious proximity are the runners, streams of pounding feet that seem, on an unseasonably warm fall Sunday, to never let up. Nearby are the pedicabs and the scooters. The father learning to skateboard. Central Park, the beloved backyard for millions of New Yorkers, is a weekly recreational battlefield. “There’s no such thing as personal space here,” a horse-drawn carriage driver sagely warns his out-of-town fare as they trot alongside the bicycles and the bodies. It is a story as old as the city: the cherished and overloved public space; the smal...