Big Rig Truck Slows Traffic On Hwy 4 Sponsored by: By B.J. Hansen Published Jun 17, 2009 04:35 pm Updated Jun 17, 2009 04:37 pm Hwy 4 View Photos Angels Camp, CA — A big rig truck has broken down on Hwy 4 just west of Angels Camp. Traffic is slow going as the truck is blocking a portion of the westbound lane. Travel with caution as of 4:35pm. The truck is near the Spence Ranch.