The build-out of a rapid transit network is too important to the Twin Cities’ future prosperity to be put at risk by one political party’s shortsighted opposition. That’s the thinking behind Gov. Mark Dayton’s decision to seek a patchwork of local financing to salvage the ready-to-build Southwest light rail line, which has stalled because of Republican opposition in the Legislature.

Dayton’s decision is the right one in the face of a bad situation. The alternative would be to kill the 14.5-mile Southwest project. That would turn down a proffered $928 million in federal funds, which would flow instead to other cities; bring no return on $140 million already expended on the project (including $30 million in state funds); cast aside seven years of planning and citizen input that resulted in unanimous consent by local governments along the line, and jeopardize the chance to win federal funds for other Twin Cities transit lines in coming years.

It would also miss a rich opportunity. Some 175,000 jobs are now situated near the proposed line from downtown Minneapolis to Eden Prairie. Build it, and that number is projected to swell to 250,000 in the next two decades. Unlike buses, rail transit is a proven catalyst for economic development.

Southwest has been described as “a train to equity.” It stands to link Minnesota’s largest concentration of underemployed workers in north Minneapolis with a sizable concentration of job vacancies in the southwestern suburbs. It also can be a magnet for young workers, eager to locate in urban settings where car ownership is not required. And it can help this region do its part to reduce climate-altering carbon emissions.