The fires sparked around 7:15 a.m., forcing the closure of the southbound No. 3 and 4 lanes near the Mission Grade Scales and the No. 5 lane near Sheridan Road, according to CHP Officer Peter Van Eckhardt.
A Sig-alert was issued at 7:40 a.m. and canceled at 8:44 a.m., CHP Officer Kevin Kroncke said.