Summary: A traffic collision occurred on the northbound I-15 between State Route 138 and an unnamed road near the 3N21 Forest Road in San Bernardino County, California. Multiple emergency units, including Medic Engine 2, Medic Ambulance 305A, and Medic Engine 305, responded to the scene. A third vehicle was reported a quarter mile up from the initial incident, and responders confirmed at least one delayed patient. The incident was coordinated through the com center, and responders checked on all involved vehicles.