Flagstaff drivers should prepare for week-long closure of Historic Route 66 in front of City Hall in June

Closure needed as crews replace the Rio de Flag bridge

Rio de Flag detour mapPHOENIX – Drivers near downtown Flagstaff should begin planning for an upcoming closure of Historic Route 66 in front of Flagstaff City Hall so the Arizona Department of Transportation can replace the Rio de Flag bridge.

Historic Route 66, also known as Business Loop 40, will be closed in both directions between US 180, known locally as Humphreys Street, and the Sitgreaves Street and Santa Fe Avenue intersection from 9 p.m. Thursday, June 10, to 6 a.m. Friday, June 18. Detour signs will be in place to direct traffic around the closure.

Drivers heading north on Milton Avenue toward downtown Flagstaff will be detoured onto Butler Avenue to San Francisco Street. Drivers are also encouraged to use I-40 to Butler Avenue to bypass the traffic impacts due to construction.  

Drivers heading south on US 180 are encouraged to use Switzer Canyon Drive to Historic Route 66 to bypass traffic impacts. Drivers that head south on US 180 in the downtown area, to get to points south and west of the project area, will turn left on Route 66 and use Beaver Street to head south to Butler Avenue and make a right to connect with Milton Road.

Drivers on Route 66 from east Flagstaff can use Switzer Canyon Drive to head north or use Ponderosa Parkway to head south and connect with Butler Avenue to get to points west and south of the project area.

Message boards will be put in place two weeks prior to the closure so drivers can begin to plan alternate travel routes.

More information on the project can be found at azdot.gov/riodeflagbridge.