Heavy boulders and dirt came sliding down on a Southern California roadway Thursday morning, blocking traffic

A landslide blocked the transition road from the westbound San Bernardino (10) Freeway to the northbound Orange (57) Freeway in the Pomona- San Dimas area sometime before 8:40 a.m., said CHP Officer Francisco Villalobos.

No injuries have been reported.

The landslide has left a massive crater along the hillside.

The westbound section of the roadway has been shut down as well as the transition from the northbound Chino Valley (71) Freeway to the northbound 57 Freeway.

"Even though the southbound traffic lanes will remain open, motorists should allow extra time because of possible congestion in the interchange area," Villalobos said.

Geologists were sent to the site, and it could take several days to a week to reopen all the traffic lanes, he said.

The northbound 57 connects with the Foothill (210) Freeway, and Villalobos suggested these alternate freeway routes: --Go east on the 10 Freeway, and north on the Ontario (15) Freeway to the 210 Freeway;
--Go west on the 10 Freeway, and north on the San Gabriel River (605) Freeway to the 210 Freeway; or
--Take the Pomona (60) Freeway, and go north on the 605 Freeway.


KTLA's Traffic Blog: http://blogs.ktla.com/traffic/