WASHINGTON - Four communities will soon share $100 million in federal funds to develop bicycle and pedestrian trails aimed at enticing commuters to give up their cars to get to work, thanks to lawmakers involved in the final negotiations on the recently passed highway bill. The four pilot projects at $25 million each were the brainchild of Rep. Jim Oberstar of Minnesota, an avid cyclist and, more importantly, the senior Democrat on the House Transportation Committee. "A lot of trails have been built for recreational purposes," said Keith Laughlin, president of the Rails-to-Trails Conservancy, an advocacy for turning abandoned railroad...