By CBS13 Staff

TURLOCK (CBS13) — Traffic is slow on northbound Highway 99 through Turlock due to a big rig trailer that looks like it partially imploded on itself Monday morning.

The accident happened just after 5:30 a.m. right near the W. Main Street on-ramp.

California Highway Patrol says the onramp will be closed for some time as the load is transferred from the damaged truck to a different trailer.

Exactly what caused the trailer to collapse is unclear.