The following is directly from ADOT...
Sections of Interstate 17 in north Phoenix are scheduled to be closed this weekend (weather permitting) while crews add new lane stripes to the freeway. Drivers are encouraged to use alternate routes to avoid traffic backups while the following restrictions are in place:
* Southbound I-17 will be closed between Bell Road and Peoria Avenue from 7 a.m. to 7 p.m. Saturday (Jan. 14) while crews add "permanent" lane stripes along the recently widened section of the freeway. Southbound I-17 traffic can exit at Bell Road and use southbound 19th or 35th avenues as alternate southbound routes to travel beyond the closure. Drivers also should consider exiting onto the eastbound Loop 101 to southbound State Route 51 (Piestewa Freeway) as an alternate freeway route to reach the downtown Phoenix area. Crews have worked in the past year to add new merge lanes, sound walls and other improvements to I-17 between Peoria and Bell.
* Northbound I-17 will be closed between Peoria Avenue and Bell Road from 7 a.m. to 7 p.m. Sunday (Jan. 15) while crews complete work add new lane stripes to the freeway. Northbound I-17 traffic will need to exit at Peoria Avenue and use 19th or 35th avenues as alternate northbound routes in the area. Drivers are encouraged to exit the freeway well ahead of the closure in order to avoid traffic backups. Drivers should also consider using northbound State Route 51 to westbound Loop 101 in north Phoenix as an alternate route to reach I-17 beyond the closure.