Improvement projects on several Valley freeways will require closures or lane restrictions this weekend, but rain could stall some of the work, state transportation officials said.

Here is a list of planned work, restrictions and detours from Friday night, Oct. 14, through Monday morning, Oct. 17:

• Westbound I-10 will be closed between US 60 and State Route 143 near Sky Harbor Airport from 10 p.m. Friday to 4 a.m. Monday for the I-10 Broadway Curve improvement project. 

Westbound US 60 ramps to westbound I-10 will be closed as will westbound I-10 on-ramps at Elliot, Baseline and Broadway roads. Westbound US 60 on-ramps at McClintock Drive, Rural Road and Mill Avenue will be closed. Southbound SR 143 will be closed at I-10 (Southbound SR 143 ramp to westbound I-10 will remain open). Southbound SR 143 on-ramp at University Drive also will be closed.

Westbound I-10 traffic can detour on eastbound US 60 to northbound Loop 101 and use westbound Loop 202 to reach I-10 and Sky Harbor Airport beyond the closure. 

Also: Eastbound I-10 will be narrowed to two lanes between 48th Street and Broadway Road from 10 p.m. Friday to 4 a.m. Monday. Note: Northbound SR 143 off-ramp at University Drive will closed from 10 p.m. Friday to 4 a.m. Sunday (Oct. 16).

• I-10 will be narrowed to one lane in both directions between Loop 202 and Riggs Road from 10 p.m. Friday to 5 p.m. Saturday and from 10 p.m. Saturday to 5 p.m. Sunday for pavement sealing.

 All ramps connecting I-10 and Loop 202 will be closed at times Saturday. Also, plan for I-10 on- and off-ramp closures between Chandler Boulevard and Riggs Road on Saturday (I-10 right lanes will be closed).  Use alternate routes, including Arizona Avenue/SR 587 in the Chandler area, to avoid I-10 work zones.

Crews will work to reopen I-10 in sections as the work progresses on Saturday and Sunday.

• Southbound I-17 will be closed between Pinnacle Peak Road and Union Hills Drive from 10 p.m. Friday to 5 a.m. Monday for a pavement-improvement project. 

Southbound I-17 ramps to Loop 101 will be closed. Both Loop 101 ramps to southbound I-17 will remain open. Detours: Consider exiting ahead of the closure and using local routes to enter eastbound Loop 101 before using southbound SR 51 to reach the downtown Phoenix/Sky Harbor Airport region. Southbound I-17 traffic exiting at Pinnacle Road Road can detour on southbound 19th or 35th avenues but expect delays.

• Westbound I-10 will be narrowed to one lane in areas between Verrado Way and Watson Road in Buckeye from 9 p.m. Friday to 5 a.m. Monday for a widening project.

Eastbound I-10 also will be narrowed to one lane between Watson Road and Verrado Way from 8 a.m. Saturday to 5 a.m. Monday. Note: Westbound I-10 off- and on-ramps at Watson Road to close for several weeks from 9 p.m. Friday to late November for interchange improvement work.  Detours to or from westbound I-10 while Watson Road ramps are closed will be available via the Verrado Way or Miller Road interchanges.

• Ongoing city of Tempe closures of the eastbound US 60 ramp to southbound Loop 101 and the eastbound US 60 off-ramp at McClintock Drive are scheduled until late October for Tempe water line repairs.

The ramp closures began Oct. 3 and are scheduled until Sunday, Oct. 30. Earlier openings of the ramps are possible. Detours: Consider using southbound Rural or Dobson roads as alternate routes.