US 191 Chinle - Black Mountain Wash Shoulder Widening

US 191 Chinle - Black Mountain Wash Shoulder Widening



Project Cost: $17.1 million

The Arizona Department of Transportation is working on a shoulder widening project on US 191 in northeastern Arizona. The project boundary is roughly between Chinle and about nine miles south of Many Farms on the Navajo Nation (milepost 448 – 460). The project is within ADOT’s existing right of way and is scheduled to be completed in fall 2023.


Project Elements

The purpose of the project is to improve safety by widening the shoulder on both sides of the roadway to reduce run-off road and rollover crashes.

The work includes, but is not limited to:

  • Installing rumble strips on centerline and shoulders
  • Installing pavement markings
  • Installing traffic delineators, as required
  • Replacing signs and pavement markers, as necessary


What to Expect During Construction

Construction will result in traffic restrictions for the traveling public. The roadway within the project boundary will be reduced to one lane of alternating north- and southbound travel through the construction zone. A pilot car will lead traffic through the work zone during construction.

ADOT will post additional information on traffic restrictions and closures as it becomes available. To receive traffic alerts and other updates by email, please subscribe here.

You can also stay informed of real-time, project-related traffic restrictions by visiting or call 511, except while driving.

Schedules are subject to change because of weather or other unforeseen factors. Remember to slow down and use caution around construction workers and equipment. 

Project Map

Project Map - US 191 Chinle - Black Mountain Wash Shoulder Widening Map




Traffic Alerts


Expect alternating lane restrictions along US 191 between Chinle and Many Farms Aug. 28-31

Drivers should expect delays

The Arizona Department of Transportation advises drivers to plan for the following travel restriction on US 191 between Chinle and Many Farms (mileposts 448-460) in far northeastern Arizona weekdays from Monday, Aug. 28, through Thursday, Aug. 31:

  • US 191 will be reduced to one lane only with alternating north- and southbound travel daily from 5 a.m. to 7 p.m. 
  • Flaggers and a pilot car will direct traffic through the work zone.
  • The speed limit will be reduced in the work zone.
  • Drivers should be prepared to stop when approaching the work zone.
  • The restrictions will be lifted each day after work hours and during the weekend.

The restrictions are needed so crews can complete pavement work and temporarily stripe the highway. 

Work will be temporarily halted from Thursday, Aug. 24, through Sunday, Aug. 27, for the annual Navajo Nation Fair.


Stay Informed


By email: Subscribe to receive traffic alerts and project updates directly to your email.

By phone: Phone: ADOT Project Information Line: 855.712.8530

Teléfono: Línea de Información del Proyecto ADOT: 855.712.8530

Online: Submit a question or comment through the ADOT website by visiting and then select “Projects” from the dropdown menu.

By mail: Write to ADOT Community Relations, 1655 W. Jackson St., MD 126F, Phoenix, AZ 85007.

ADOT Project Number: 264 CN 324 F0231 01C; Federal-Aid Number: STBG 264-A(220)T