Starting Friday, Capital Metro will temporarily halt rail service between its Leander and Lakeline stations, according to the transportation authority’s website. MetroRail service is expected to resume June 29 after the closure, which is related to construction on the track. This announcement comes after Capital Metro President and CEO Randy Clarke announced in May that the authority would begin three pilot programs this summer, including Positive Train Control, a federally-mandated signaling system. The first segment under construction for the system is in Leander, he said. Riders may learn about alternative public transit options at http://www.capmetro.org/railroutes.