The Arizona Department of Transportation is reminding residents and travelers of overnight lane restrictions on State Route 169 in Yavapai County beginning Monday evening. Restrictions are in place so crews can repair the guardrails along the roadway. State Route 169 will be narrowed to one lane with alternating north and southbound travel between the junction with Interstate-17 and National Forest Road 9604F. Flaggers will be guiding traffic, and the speed limit will be lowered to 45-miles-per-hour in the work zone. Overnight restrictions will be in place beginning at 6 p.m. on Monday and will be lifted Tuesday at 6 a.m. ADOT reminds motorists to slow down and use caution when traveling near crews and equipment.