ADOT will be instituting lane restrictions on Interstate-40 west of Flagstaff starting Tuesday morning. Traffic will be reduced to one lane, east and westbound at Exit 191 which is the Flagstaff Business Loop Exit, while work continues on the bridge replacement project there. Lane reductions will start Tuesday morning at 5 a.m. and run through 5 p.m. Friday. The on and off ramps remain closed at the exit as well, so drivers will have to exit off Flagstaff Ranch Road. Drivers should plan for extra travel time and slow down when entering work zones, especially when there are workers and equipment present.