The express toll lanes on the westbound Riverside (91) Freeway in Corona will be closed this weekend for crews to re-stripe roadway surfaces and install upgraded transponders that keep track of traffic.

According to the Riverside County Transportation Commission, work will get underway about 9 p.m. Friday, and the westbound express lanes will remain out of service until 4 a.m. Monday.

Express lanes will also be shut down on the Orange County side, between the Corona (71) Expressway and state Route 241, from 9 p.m. Friday to noon Sunday, RCTC officials said.

Eastbound toll lanes will be closed, as well, but for a much shorter duration — between 4 a.m. and noon Sunday.

RCTC spokesman John Standiford said alternating general purpose lane closures are planned as part of the same project on the westbound 91, between 9 p.m. Friday and 7 a.m. Saturday, and from 7 p.m. Saturday to 10 a.m. Sunday.

“The re-striping of the westbound 91 express lanes will provide a smoother transition for vehicles exiting and entering these lanes near the county line,” Standiford said. “Crews will re-stripe this area to allow motorists to enter or exit at any point where there is a broken white line. The new striping will allow vehicles to exit the 91 express lanes in Riverside County later, or enter the 91 express lanes in Orange County sooner.”

Motorists concerned about delays should consider using alternate west-east routes, including the Pomona (60) Freeway, according to Standiford.

He said transponder interrogators that electronically monitor traffic using the express lanes need to be modified for uniformity with toll services in neighboring states, including Oregon and Washington.

Information about the lane closures, road work schedules and detours can be found at www.15project.info .

>> Want to read more stories like this? Get our Free Daily Newsletters Here!