This 2007 New York Times op-ed piece, by Bradley and Dennis Tirpak, explores the call for greener yellow cabs, exposing the financial and environmental cost of keeping the old gas guzzlers on the road. This debate was roiling as gas prices soared in the mid/late 2000s and as the Design Trust’s Roads Forward study was underway, paving the way for the 2010 Taxi of Tomorrow program, with its explicit goal of reducing emissions for the 13000 strong fleet.