Freeway and road closures across the Inland Empire for this week include the following:

Riverside County

91 Freeway and express lanes (today through Friday)

Eastbound: Alternating lane closures from the Orange County/Riverside County line to the 15 Freeway in Corona, 10 p.m. to 6 a.m. through Thursday. Friday hours are 11 p.m. to 7 a.m. No detours; other lanes will be open.

Westbound: Alternating lane closures from the 15 Freeway in Corona to the Orange County/Riverside County line, 8 p.m. to 4 a.m. through Thursday. Friday hours are 8 p.m. to 6 a.m. No detours; other lanes will be open.

Eastbound express lanes: From the Orange County/Riverside County line to the 15 Freeway in Corona, 10 p.m. to 6 a.m. through Thursday. Friday hours are 11 p.m. to 7 a.m. No detours; other lanes will be open.

Westbound express lanes: From the 15 Freeway in Corona to the Orange County/Riverside County line, 8 p.m. to 4 a.m. through Thursday. Friday hours are 10 p.m. to 7 a.m. No detours; other lanes will be open.

71 Freeway (today through Friday)

Northbound: Alternating lane closures from the 91 Freeway in Corona to Butterfield Ranch Road/Euclid Avenue in Chino Hills, 9 p.m. to 4 a.m. through Thursday. Friday hours are 11 p.m. to 7 a.m. No detours; other lanes will be open.

Southbound : Alternating lane closures from Butterfield Ranch Road/Euclid Avenue in Chino Hills to the 91 Freeway in Corona, 9 p.m. to 5 a.m. through Thursday. Friday hours are 11:59 p.m. to 6 a.m. No detours; other lanes will be open.

Ramp/connector closures (today through Friday)

Eastbound 91 Freeway to northbound 71 Freeway connector in Corona: Closed 10 p.m. to 6 a.m. through Thursday. Friday hours are 11:59 p.m. to 7 a.m. Detour is the eastbound 91 Freeway to Serfas Club Drive and Auto Center Drive in Corona.

Eastbound 91 Freeway, Green River Road on-ramp in Corona: Closed 10 p.m. to 6 a.m. through Thursday. Friday hours are 11:59 p.m. to 7 a.m. Detour is Green River Road, eastbound Palisades Drive and northbound Serfas Club Drive in Corona.

Northbound 15 Freeway to westbound 91 express lanes connector in Corona: Closed 8 p.m. to 4 a.m. through Thursday. Friday hours are 10 p.m. to 7 a.m. No detours; other lanes will be open.

Southbound 15 Freeway to westbound 91 express lanes connector in Corona: Closed 8 p.m. to 4 a.m. through Thursday. Friday hours are 10 p.m. to 7 a.m. No detours; other lanes will be open.

Northbound 15 Freeway, Temecula Parkway on-ramp in Temecula: Closed through May 19 at 5 a.m. Detour is west on Temecula Parkway, northbound on Old Town Front Street, east on Santiago Road, north on Ynez Road, and west on Rancho California Road to enter the northbound 15.

15 Freeway (Tuesday through May 21)

Northbound and southbound 15 Freeway, Temecula: Alternating lane closures from just north of Temecula Parkway to just north of Winchester Road, 8 p.m. to 6 a.m. Tuesday through Saturday. Additional night closures may be scheduled May 19 and May 20, with work ending May 21, in the morning. Ramp closures will also occur at northbound and southbound Rancho California Road and southbound Winchester Road. Work is for the French Valley Parkway/15 Freeway improvement project.

15 Freeway, Corona (Through Tuesday)

Southbound 15 Freeway: Lane and ramp closures between north of Cajalco Road overcrossing and Bedford Wash Bridge, 10 p.m. to 6 a.m. nightly through Tuesday. Closures include Cajalco Road ramp lanes for lane restriping and pavement resurfacing. Southbound daytime work will be behind barriers. Expect delays. Work began Saturday.

WEST VALLEY CONNECTOR

Eastbound and westbound Holt Boulevard at Central Avenue in Montclair: Lane closures today 6 a.m. to 4 p.m., for preconstruction work on the West Valley Connector bus rapid transit line.

Holt Boulevard corridor: Lane closures between Corona Avenue and Central Avenue in Ontario, 6 a.m. to 4 p.m., for roadway widening for the bus rapid transit line. Two lanes will remain open in each direction. Street parking along both directions of Holt Boulevard has been eliminated.

Pomona: Eastbound Holt Boulevard at Garey Avenue: Lane closures, 6 a.m. to 4 p.m., for preconstruction work on the bus rapid transit line.

Pomona: Eastbound Holt Boulevard at Clark Avenue: Lane closures, 6 a.m. to 4 p.m., for station construction, including demolition, utility relocation, and construction of bus pads and new stations.

Sources: San Bernardino County Transportation Authority, Riverside County Transportation Commission and Caltrans. If you have a suggestion for this weekly list, email staff writer Arianna Clay at aclay@scng.com.