fire 138CAJON PASS, CA. (Pain In The Pass) > The back end of a semi tractor-trailer caught fire as the vehicle headed down Hhway 138 toward Interstate 15 SaturdayThe fire forced the closure of Hhway 173 from the junction of Hhway 138 to 6.9 miles east of the intersection of Hhway 138 at Arrowhead Lake Road, according to Caltrans.