Historic Route 66 closing in front of Flagstaff City Hall tomorrow night for Rio de Flag bridge replacement

Closure in place until June 18; drivers will use marked detours

In order to replace the Rio de Flag bridge, the Arizona Department of Transportation is closing Historic Route 66 in front of Flagstaff City Hall at 9 p.m. on Thursday, June 10, for the next seven days. Drivers will need to use marked detour routes to get around the closure. Rio de Flag detour map

The closure is in both directions between US 180, known locally as Humphreys Street, and the Sitgreaves Street and Santa Fe Avenue intersection. It is scheduled to last around the clock until 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. Local drivers, and those visiting the area from the Valley and other points south are encouraged to use I-40 eastbound 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.

During the week-long closure, crews will install precast bridge girders and pour a new bridge deck. Fabricating the bridge components ahead of time as opposed to building them in place allows the work to go more quickly, reducing the time needed to replace the bridge and impacts to traffic.  

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