A full weekend closure of the 91 Freeway in Corona beginning Friday night had authorities warning drivers to avoid the area if possible.
The eastbound and westbound lanes on the 91 Freeway between the 71 Freeway and I-15 will be closed from 9 p.m. Friday to 4 a.m. Monday, according to the "91 Steer Clear" project's website.
The 55-hour closure was scheduled to allow for three major construction projects taking place in the area.
Crews planed to demolish the west side of the Maple Street Bridge that extends over the 91 Freeway, install support beams for the new westbound Maple Street flyover ramp bridge and pave the new eastbound 91 Freeway alignment near the I-15, according to the website.
Motorists traveling on the 91 Freeway, the 71 Freeway or the I-15 near the project can expect delays of three to four hours.
Drivers were urged to avoid the area altogether, but could use the 57 Freeway, 60 Freeway and I-10 as alternate routes if needed.
Nightly closures of the eastbound 91 Freeway were expected to continue for about a week after this weekend's closure while crews continue to work on reconstructing the Maple Street bridge and building the flyover connector ramp bridge, according to the website.
Once the work is completed this summer, another full closure of the 91 Freeway may be conducted in order to remove temporary support beams that will be placed this weekend.