State Route 89A will be closed overnights this week during a pavement repair project. Officials say motorists traveling State Route 89A in Prescott will find the interchange at Glassford Hill will close between 7 p.m. and 6 a.m. through Friday. ADOT says detour signs will be clear to motorists. Alternate routes include the Viewpoint and Granite Hills Parkway interchanges. Drivers who use the area to commute, allow for extra time to get around the construction zone.