Traffic was backed up for miles Friday as police activity forced the closure of two lanes on the northbound 15 Freeway near Victorville.
California Highway Patrol responded to a call just after 1 p.m. The driver of a sem-truck contacted officials saying he may have struck a pedestrian.
A Sig Alert was issued for at least three hours near Dale Evans Parkway, Caltrans District 8 tweeted at 1:30 p.m.
All lanes have been cleared.