The Arizona Department of Transportation is reminding Flagstaff residents and travelers of daytime alternating ramp closures on Interstate 40 at A-1 Mountain Road beginning Saturday. Ramp closures are needed for crews to continue working on the A-1 Mountain Road bridge replacement. Travelers heading to A-1 Mountain Road on eastbound I-40 will be detoured to exit 191, before turning around and heading west on I-40 to access A-1 Mountain Road. Travelers heading to A-1 Mountain Road westbound on I-40 will be detoured to Hughes Avenue before turning around and heading east on I-40 to access A-1 Mountain Road. Construction will begin at 6:30 a.m. on Saturday and finish at 5:30 p.m. Sunday. ADOT reminds residents and travelers to slow down and use caution when traveling near crews and equipment.