It's not a sign drivers want to see, but it's one folks on the 15 Freeway won't want to miss: a warning about the 55-hour closure of the southbound side of the 15, just below the Cajon Pass.
Caltrans spokesperson Terri Kasinga said the closure has the potential to jam traffic for miles and make for delays of more than two hours.
The reason for the closure is to install a brand new culvert at the Duncan Canyon Road exit. The storm drainage system will help water flow from the east side of the freeway to the west side.
MORE: Fire truck tumbles over side of 15 Freeway as road collapses
"Everywhere in that area could become a flood plain. We saw it happen in the Cajon Pass, where the lanes collapsed and a fire truck went down with it, so this project is to add new drainage to that facility, and it's needed," Kasinga explained.
The San Bernardino County fire engine that fell off the side of the 15 Freeway as the road gave way because of severe flooding on Feb. 17 was a sight many would not forget.
MORE: Crew recalls fire truck tumbling off 15 Freeway as road collapses
The closure will begin Friday at 9 p.m. and should reopen Monday at about 4 a.m., according to Caltrans officials. A closure of the northbound lanes is scheduled for next week.