PHOENIX – Mostly overnight closures of Interstate 10 are scheduled near downtown Phoenix this weekend for quarterly maintenance work in the Deck Park Tunnel, according to the Arizona Department of Transportation. Drivers should allow extra travel time, use caution and consider alternate routes while the following restrictions are in place this weekend (Sept. 14-17):

• Eastbound Interstate 10 closed between the I-17 “Stack” interchange and State Route 51 from 9 p.m. Friday to 9 a.m. Saturday (Sept. 15) for tunnel cleaning and maintenance. Both I-17 ramps to eastbound I-10 closed. DETOUR: Eastbound I-10 traffic can detour to southbound I-17 at the Stack and reconnect with I-10 at the “Split” interchange near Phoenix Sky Harbor International Airport.
• Westbound Interstate 10 closed between the I-17 “Split” interchange near Sky Harbor Airport and Seventh Avenue from 9 p.m. Saturday to 9 a.m. Sunday (Sept. 16) for tunnel cleaning and maintenance. Southbound SR 51 ramp to westbound I-10 closed. Westbound Loop 202 (Red Mountain Freeway) ramp to westbound I-10 will remain open but traffic must exit I-10 at Seventh Street and use alternate routes, including westbound McDowell Road to Seventh Avenue. Westbound I-10 on-ramp via Sky Harbor Circle and Washington/Jefferson streets will be closed but traffic can still use ramp to access northbound SR 51 and eastbound Loop 202. Southbound I-17 ramp to westbound I-10 near Sky Harbor Airport closed. DETOUR: Westbound I-10 traffic can detour to northbound I-17 at the Split and reconnect with I-10 at the Stack north of Van Buren Street.
• Westbound Interstate 10 narrowed to three lanes between 48th and 32nd streets near Sky Harbor Airport from 9 p.m. Friday to 9 a.m. Saturday (Sept. 15) for barrier wall repairs. Eastbound I-10 HOV lane also closed in the area. DETOUR: Please be prepared to slow down and merge safely in work zone. Watch for work crews and equipment.
• Eastbound I-10 access road closed between 67th and 51st avenues from 9 p.m. Friday to 4 a.m. Monday (Sept. 17) for work on the Loop 202 South Mountain Freeway interchange. 59th Avenue also closed between I-10 and Roosevelt Street. DETOUR: Please consider alternate routes.
• Westbound I-10 narrowed to one lane overnight between 43rd and 59th avenues from 9 p.m. to 5 a.m. Sunday through Thursday nights (Sept. 16-20) for work on the Loop 202 South Mountain Freeway interchange. DETOUR: Please allow extra travel time and be prepared  to slow down and merge safely in work zone.
• State Route 143 (Hohokam Expressway) narrowed to one lane in both directions overnight between Washington Street and McDowell Road in Phoenix from 9 p.m. to 5 a.m. Sunday through Thursday nights (Sept. 16-20) for pavement improvements. DETOUR: Please allow extra travel time and consider alternate routes, including I-10 and Loop 202 (Red Mountain Freeway). NOTE: Eastbound Loop 202 (Red Mountain Freeway) ramp to McDowell Road closed Sunday through Tuesday nights (Sept. 16-18).

Drivers also should allow extra travel time for any ramp closures that already are in place. For example, the northbound I-17 ramp to westbound I-40 in Flagstaff is closed until late this year for a bridge-improvement project.