• Westbound (WB) Holt Boulevard Off-Ramp Closure: The WB Holt Boulevard off-ramp is scheduled to close on Tuesday, November 30 at 5:00 a.m. through Friday, December 10 at 5:00 a.m. Detour route will be posted and includes Vineyard Avenue.

• Grove Avenue Closure: Scheduled for the night of December 10, Grove Avenue under I-10 will be closed while steel girders are set in place near the shoulder of the eastbound (EB) I-10. Detour routes will be posted.

• San Antonio Creek Channel: The I-10 over San Antonio Wash is being widened. This work began in mid-August 2021 and will take approximately six months. Daytime and nighttime activities include installing and grading approach slabs.

• Monte Vista Avenue: Crews continue to relocate underground utilities at Monte Vista Avenue and are building a new wider section of the EB side of the freeway. Work on Monte Vista Avenue began in spring 2020 and will last for approximately three years. Monte Vista Avenue under I-10 is reduced to one lane in each direction during daytime hours and will be closed nightly from 11:00 p.m. to 5:00 a.m., Monday through Friday. Detour routes are posted. Daytime activities include installing steel plates into the ground (shoring) and relocating utilities and drainage.

• Central Avenue: In November 2020, a portion of the EB I-10 shoulder over Central Avenue was removed. Bridge widening work will take approximately 18 months. Daytime activities include installing barriers and utility work.

• Benson Avenue: A portion of the EB I-10 shoulder over Benson Avenue was removed in early December 2020. Bridge widening work will continue for approximately two years. Benson Avenue is reduced to one lane in each direction. Daytime activities include backfilling and installing the approach slabs.

• Mountain Avenue: In November 2020, crews removed a portion of the EB I-10 shoulder over Mountain Avenue. Bridge widening work will take approximately 18 months. Daytime activity includes building portions of the bridge.

• San Antonio Avenue: Crews are continuing to relocate utilities on San Antonio Avenue and preparing the bridge for demolition, anticipated in late-2021.

• Euclid Avenue: Crews demolished the east side of the bridge and are working on rebuilding the northbound (NB) lanes. Work on Euclid Avenue began in mid-May 2020 and will last for approximately 18 months. Daytime and nighttime activities include utility installation and relocation.

• Sultana Avenue: The Sultana Avenue bridge over I-10 is now open.

• Campus Avenue: Campus Avenue over I-10 was demolished in mid-October 2021. The bridge will be rebuilt into a wider configuration to accommodate the additional lanes on the I-10. Construction will last approximately nine months. Nighttime activity includes installing steel plates into the ground (shoring).

• 6th Street: 6th Street over I-10 was demolished in early October 2021. The bridge will be rebuilt into a wider configuration to accommodate the additional lanes on the I-10. Construction will last approximately nine months. Daytime activities include excavation, installing abutment tiebacks and steel plates into the ground (shoring), and building portions of the support wing walls.

• Grove Avenue: A portion of the EB and WB I-10 shoulder over Grove Avenue was removed in December 2020. Scheduled for December 10, Grove Avenue under I-10 will be closed while steel beams (girders) are set in place next to the EB shoulder. Daytime activity includes constructing bridge walls.

• 4th Street: Crews continue to relocate underground utilities at 4th Street and are building a new wider section of the EB side of the freeway. Work on 4th Street began in spring 2020 and will last for approximately two years. 4th Street between El Dorado Avenue and Vineyard Avenue is reduced to one lane during daytime hours. 4th Street under I-10 will be closed nightly from 7:00 p.m. to 5:00 a.m. Detour routes will be posted. Daytime and nighttime activities include building portions of the bridge overhang and utility installation and relocation.

• Vineyard Avenue: The east side of Vineyard Avenue over I-10 was partially demolished in early March 2021. Construction will last approximately 18 months. Vineyard Avenue over I-10 may have reduced lanes during daytime and nighttime hours. Daytime activity includes building the bridge supports.

• Cucamonga Wash Bridge: The EB I-10 over the Cucamonga Wash Bridge is being widened. Construction will last approximately nine months. Daytime activities include paving, backfilling, and building walls.

• Day Canyon Channel: Work began in early August 2021 to widen the I-10 over Day Canyon Creek. Construction will continue for approximately nine months.

• Scheduled intermittent nighttime connector ramp closures (11:00 p.m. to 5:00 a.m.):
• NB I-15 to WB I-10
• Southbound (SB) I-15 to WB I-10
• EB I-10 to NB/SB I-15

• Intermittent nighttime lane closures: EB and WB I-10 between Fairplex Drive and I-15. At least one lane in each direction on I-10 will remain open.

• Intermittent daytime lane closures: EB and WB I-10 between Indian Hill Boulevard and Euclid Avenue. Four lanes in each direction on I-10 will remain open. These closures will occur between 9:00 a.m. and 2:00 p.m.

• Monte Vista Avenue EB on-ramp closed in August 2020 and will be closed for approximately two years. Detour routes include Arrow Highway and Palo Verde Street to Central Avenue.

• WB Holt Boulevard off-ramp is scheduled to close Tuesday, November 30 at 5:00 a.m. through Friday, December 10 at 5:00 a.m. Detour route will be posted.

• Scheduled intermittent nighttime EB and/or WB on- and off-ramp closures (detour routes will be posted): Monte Vista Avenue, Central Avenue, Mountain Avenue, Euclid Avenue, 4th Street, Vineyard Avenue, Archibald Avenue, Holt Boulevard, Haven Avenue, Milliken Avenue, and Etiwanda Avenue.

• Daytime and/or nighttime lane closures (streets will remain open):
• Monte Vista Avenue, Palo Verde Street, Benson Avenue, Mountain Avenue, San Antonio Avenue, Euclid Avenue, Grove Avenue, 4th Street, Fresno Avenue, Princeton Avenue, and Vineyard Avenue

• Nighttime street closures (detour routes will be posted); businesses will remain accessible:
• Monte Vista Avenue: NB/SB street closed under I-10 from 11:00 p.m. to 5:00 a.m.
• Palo Verde Street: WB street closed from Central Avenue to Monte Vista Avenue
• Princeton Avenue: EB/WB intermittently closed approaching Grove Avenue
• 4th Street: EB/WB street closed under I-10 from 7:00 p.m. to 5:00 a.m.

• Retaining wall and sound wall locations:
• EB I-10: intermittently from Central Avenue on-ramp to Mountain Avenue on-ramp, next to San Antonio Avenue, intermittently from Euclid Avenue to Haven Avenue
• WB I-10: from 4th Street to Grove Avenue and intermittently from Campus Avenue to San Antonio Avenue