WASHINGTON — Efforts to alleviate traffic for tens of thousands of D.C.-area commuters were approved Wednesday, but not before Maryland attempted to eliminate a provision pushing for uniform tolling practices across the region’s express lanes. The resolution adopted by the region’s Transportation Planning Board is the first concrete action toward new goals developed over the last two years to reduce traffic jams and get people from home to work or other activities faster and with more efficiency. “The first step, a concrete effort, toward the projects, programs and policies this region [will] fund and implement in the coming years,” said...