...
The only way I could really see CHI-KCY corridor service happening is if the states upgraded the track to 110mph. The Southwest Chief however already averages just over 60mph based on the Amtrak timetable. If the hypothetical 110mph upgrades were to happen, an opposing train could be run with just one extra trainset. In another topic, it was pointed out that 79mph to 110mph is a 39% speed increase. Applying this speed increase to travel time decrease brings us to 4.4 hours travel time. This would put the SWC in Chicago, and our hypothetical train in Kansas City, by about noon each. Using the same arrival times for our hypothetical departures means the WB SWC, and EB hypothetical train leave at 5:30pm for 10:00pm arrivals. This would give five and a half hours to turn our hypothetical train in Kansas City. Unfortunately, Kansas City to Chicago is one of those corridors where there aren't enough intermediate stops to justify the extra equipment, or extra investment (110mph) to make corridor service practical, particularly in today's political and economic climate.
As you noted, the SWC already has a very good trip time from CHI to KCY at 7.25 hours. The trip time remarkably beats driving according to the map applications I checked. Not many LD major city pairs that can make that claim. The route may see some trip time reductions on the CHI to Galesburg segment from CREATE projects in Chicago and any IL upgrade projects for faster service to Quincy or the new service to the Quad cities. But there will be little interest in making major upgrades to a route with so few significant population centers on the route between CHI and KCY.
The SWC already provides KCY with good day time hours for trips to CHI. Departs KCY in the morning at 7:43 AM, arrives CHI at 3:15 PM. Departs CHI mid-afternoon at 3 PM, arrives KCY at 10:11 PM. Those are not lousy middle of the night 3 AM departure or arrival times. Since it is an LD train, it will be frequently be late departing KCY for CHI while a corridor train will be more reliable. But an hour or 2 late #4 still gets one into CHI in time for dinner or taking a connecting Metra train. Unless there is huge demand in KCY for taking the SWC to Chicago, starting a corridor train over this route is going to be way down the list of passenger rail priorities.
Speaking of priorities, I pulled up the Missouri 2012 State Rail Plan. Their proposed passenger rail plans are:
- Improve the River Runner with the currently funded track projects and let ridership continue to grow,
- Lincoln service upgrades to ultimately reduce CHI-STL trip times to 4 hours,
- add a 3rd round trip to the River Runner,
- in the long run upgrade the River Runner to 90 mph max speeds and 6 round trips a day,
- provide service to Springfield MO, STL to Springfield, KCY to Springfield,
- extend the Illinois Zephyr and Carl Sandburg from Quincy to Hannibal, MO
Nothing in there about a KCY to CHI corridor service over the SWC route.