A single-lane closure on West Run Road between Longfellow Drive and Bell Way in Munhall will begin at 7 a.m. on Thursday, April 23. The closure, which is expected to last about three weeks, is required for installation of a gabion basket retaining wall. The closure will occur between 7 a.m. and 3 p.m. on weekdays. Traffic will be controlled using flaggers, and drivers are urged to use caution in the area.