FLAGSTAFF — A one-day ramp closure and a detour to JW Powell Boulevard will be in place to prepare for and accommodate construction of a roundabout on the east end of the project area.

Access to the I-17 southbound off-ramp at Exit 337 (JW Powell Boulevard) will be closed on Wednesday, April 15, from 8 a.m. to 4 p.m., to install a temporary concrete barrier in preparation for the next phase of roundabout construction. This work is part of the intersection improvement project currently underway which includes new roundabouts and realignment of SR 89A/Beulah Boulevard.

The recommended detour for southbound I-17 connections to the Flagstaff Airport and to SR 89A is to continue southbound on I-17 past Exit 337, then exit at Kachina Trail/Mountainaire Road (Exit 333). Detour signage will be in place to assist travel in the area.

Travel through to JW Powell Boulevard via the existing roundabout will be closed to accommodate the new roundabout construction. Access to JW Powell will be maintained for both north- and southbound traffic along SR 89A via a cross-over just south of the construction zone and directed by area signage. This detour is expected to be in place until the end of June and will allow crews to build the new roundabout at the east end of JW Powell Boulevard.

ADOT advises drivers to proceed through the work zone with caution, slow down, and be alert for construction equipment and personnel.