A big rig accident on northbound Highway 99 caused major back-ups Friday afternoon. 

The accident took place about 12:30 p.m. near the Highway 50 connector ramp, and is causing sluggish movement all the way back to Elk Grove.

Minor injuries were reported in the accident. 

Drivers should avoid the area if possible and take northbound Interstate 5 as an alternate route until the accident is cleared.