If you're going to extend to GJT, I have to wonder why you don't just bite the bullet and extend to SLC. At roughly seven hours between the two cities, departing GJT at 6 AM would permit a departure at about 11 PM from SLC. Not ideal, I know, but far better than 3 AM if the train is on time. Likewise, the SLC arrival would be around 6:00 AM (possibly a hair later). Again, it's not ideal, but it beats 11 PM (if you're lucky) as an arrival time. On the one hand, you'd burn an additional set; on the other hand, SLC is a larger city and I'm going to suspect that it would be easier to do any relevant crew basing in a city of that size than to do it in western Colorado.
Another note I'll add: While I wouldn't move the CZ over from the BNSF line to the IAIS line at the outset, I'd be open to doing so if ridership at the southern Iowa stations craters even with the presence of Thruway services. Right now, you're looking at around 60k at those stations. If that were to drop by 2/3 (to about 20k), I'd say reroute the train (particularly if doing so will increase overall ridership). The key, though, is that I'd wait for the ridership drop to move the train, since the shift will both complicate the dispatching situation and lose an existing slot along that route. The fact that there would, under such a scenario, already be a massive amount of service along the IAIS line (and that you could probably work out a decent Thruway network in the state that would be of net fiscal benefit to the network due to added ridership, and that could link to the CZ) would also weigh towards keeping the CZ where it is now, as would the stops on the route and connections to/from it in IL.
Another note I'll add: While I wouldn't move the CZ over from the BNSF line to the IAIS line at the outset, I'd be open to doing so if ridership at the southern Iowa stations craters even with the presence of Thruway services. Right now, you're looking at around 60k at those stations. If that were to drop by 2/3 (to about 20k), I'd say reroute the train (particularly if doing so will increase overall ridership). The key, though, is that I'd wait for the ridership drop to move the train, since the shift will both complicate the dispatching situation and lose an existing slot along that route. The fact that there would, under such a scenario, already be a massive amount of service along the IAIS line (and that you could probably work out a decent Thruway network in the state that would be of net fiscal benefit to the network due to added ridership, and that could link to the CZ) would also weigh towards keeping the CZ where it is now, as would the stops on the route and connections to/from it in IL.
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