The distinction between how rail and road projects can happen in Central Texas — state law requires Capital Metro to ask voters for permission to build or expand a rail line, while road builders can proceed, even on a tollway project, without an election — has always rankled transit supporters.The Legislature added that requirement for Capital Metro rail elections in 1997 when the agency was in turmoil and anti-rail lawmakers held sway. Since then, area voters have OK’d one rail project — the MetroRail commuter line in 2004 — and twice said no to light rail (that second rejection, however, was of...