Union Pacific SD70ACe 3033 (along with SD70M 3823, ET44AC 2716 and AC4400CW 5889 up front, and AC4400CW 5958 as the rear DPU) bring manifest train MRVLB-01, which originated in Roseville CA, off the Mojave Sub and onto the Alhambra Sub as it heads to Long Beach CA.
Just poking into the photo on the left, and passing under train MRVLB-01, is UP ES44AC 5502, leading UPS Expedited Intermodal train ZAILA-01 (Atlanta GA to Los Angeles CA).