Government officials in the Washington region, as well as nationwide, are looking increasingly to bus rapid transit for new transit options as they face tightening public purses. BRT plans are under way in Alexandria and Arlington County, where buses are planned to travel from Braddock Road to Pentagon City. Alexandria expects to begin construction in July and start running buses in dedicated lanes in December 2013, said Abi Lerner, Alexandria's deputy director of transportation. Arlington expects to complete its half of the system in spring 2014. Across the Potomac, Montgomery County officials have proposed a 160-mile system with 23 routes....