The first three route segments are listed only for completeness, since little if any BNSF I-5 Corridor traffic travels south of Barstow in trains that cover the I-5 Corridor north of Barstow.
Most, if not all, trains operating over the BNSF I-5 Corridor originate or terminate at Barstow
At Fallbridge, the BNSF I-5 Corridor splits, with some trains running to/from Everett, WA, via Vancouver, WA, some running only to/from Vancouver, WA, and others running to/from Pasco, WA.