Idaho 16 lane closures planned Crews will be wedge milling Friday (July 6) near Substation Road on the Idaho 16 project, causing lane closures from 8:30 a.m. to 4 p.m., the Idaho Transportation Department announced. Work also will involve removal of the asphalt from the surface of the Black Canyon Canal Bridge deck. A lane closure, governed by a temporary signal, will be set up on Monday morning (July 9) to allow repairs to be made to the bridge. The lane closure will be in effect for 13 days. The speed limit through the work zone will be reduced to 45 mph. Traffic will be controlled by the signals except during the heavy morning and evening weekday commutes (6-8:30 a.m. and 4-7 p.m.), when flaggers will be used to keep traffic flowing.