I have little faith in that project operating by 2030. Brightline has proven they can do, quickly, everything the government tells us is impossible. As of right now, the Arizona website notes: "There is currently no construction schedule and no funding identified for a project to build a rail system between Tucson and Phoenix. Moving forward, the public and policymakers will decide how to generate the funding to pay for the project".
IE don't count on anything before 2030. For comparison, how long has NICTD been saying the same thing about the MIchigan City bypass? Amtrak about the Hudson tunnels? Metra about the SWS going into LaSalle? These have all been under perpetual study since 1990. Heck Boston's NEC electrification took 24 years!
Also, Brightline opened in a corridor directly served by a commuter authority on the same route, with stops only a mile apart or so. If my experience with the Tri Rail was indicative of their usual service (below) I don't worry about Brightline suffering from Tri Trail competition. Like Tri rail, the any UP-hosted operation will have to deal with UP freights. I've spent quite a few times inbound to Tucson waiting for UP freights. 10 miles north of town, sit for half an hour. That won't fly in a corridor service charged with expediently moving business travelers over 90 miles. It totally ruins the math. Every time a corridor train with 200 passengers gets delayed 30 minutes for a freight, that's 200 people that likely will drive next time.
Finally, consider the goals of each operator: An Arizona-owned train will be run for the purpose of shuttling commuters into Phoenix. A Brightline-owned operation will be for moving people point-to-point between Sky Harbor, a handful of developments between the two towns, University of Arizona, and Davis-Monthan.
Tri Rail:
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The new Acela: It's not Aveliable.