The Gotham Gazette has a feature on a new effort to reintroduce trolleys on 42nd Street:

A private group of urban and transportation planners and architects, calling itself vision42, resurfaced the idea of a 42nd Street light rail line recently with the release of a set of planning and economic reports. The reports, funded by an anonymous donor, set out an ambitious vision for 42nd Street as a tree-lined, pedestrian-friendly enclave running from river to river. Train tracks would be installed on a landscaped pedestrian boulevard. Unlike the 1990s plan approved by the City Council, the street would be closed to traffic. Futuristic low-floor light rail vehicles would replace taxis, buses, trucks and cars that now dominate the street. This famous east-west artery in Manhattan would join Fulton Street in downtown Brooklyn and Nassau Street in lower Manhattan as car-free streets.