This is a bit OT, but I wish that improving the maximum speeds on the LD routes out west from 79 mph to 95 mph (or even 110 mph) would happen before the money was spent to improve Acela from 135 to 160. The same amount of money spent out west would save a lot more passenger hours than it would here in the east. I am glad the Acela is getting the upgrades, and I realize that the speed increase is just the lagniappe, so to speak, but thinking about what that kind of money could do for the California Zephyr or the Empire Builder... And building a third track for the Sunset Limited in a few locations might unclog some severe choke points.
Trains 'out West', that use calendars instead of clocks for timekeeping.....what does it matter if minutes or even hours were saved? For the passengers on the transcontinental trains, time is of little consequence....just aboard mainly for pleasure. I do however, support effort to make what schedules they do have, reliable.
That's only dealing with the longer-distance passengers on said trains (i.e. EMY/SAC-CHI). With certain city pairs, such as CHI-DEN or less, CHI-MSP, SAC/EMY-Reno, LAX-SAC/EMY, CHI/STL-Dallas, Dallas-San Antonio, San Antonio-Houston-NOL, and other "shorter" pairs, those time differences make a very real difference in terms of marketability versus driving/taking a bus.
Naturally, with all of that said, I think a serious discussion on priorities is fair here...we probably can't get back to the situation we had in the 50s (when taking a day en route was not a big deal), but there
is market share and ridership to be won. Let me give a few quick examples here:
1) Chicago-Minneapolis/St. Paul is a 418 mile run. Presently, that run takes 8:16 WB (or 496 minutes)*, for an average speed of 50.6 MPH. Minnesota currently thinks there might be enough business on that run to justify at least a second train on the route (I concur, for the record), and MSP generates a good deal of business for having just a single train per day in each direction (IIRC, ridership at the station runs about 120k/year, depending on how disrupted the Builder gets). Let's move that average speed up to 60.6 MPH, which will cut the runtime from 8:16 to 6:54. How much extra business do you think Amtrak could get with that speed? What if we move the speed up to 65 MPH even (which is going to be driving competitive most of the time once you throw in stops for fuel/food and possible traffic and/or weather), which would get 6:26? Either top speed should be doable with 90/110 MPH top speeds.
2) CHI-DEN is a 1038 mile overnight run which takes 18:15, or 1095 minutes, for an average speed of 56.9 MPH. Again, let's just throw 10 MPH onto the top speed, which would get us to 66.9 MPH. That, in turn, would knock the travel time down to 15:31 (or 931 minutes), for a time savings of 2:44. More importantly in many regards, however, this could allow the WB Chicago departure time to be moved forward by perhaps an an hour to 90 minutes (to avoid jamming Omaha and Lincoln too badly) and the EB arrival to be moved back similarly (same reasons). The resulting 3:00/3:30 PM departure becomes more sellable when combined with the convenient Denver arrival. Bumping things further (to an average speed of 70 MPH) gets you down to 890 minutes (or 14:50), which could be used to push the departure time to just after 4 PM. Lincoln is going to get screwed here, but the net business CHI-DEN should help make up for that. Moreover, cutting the time into the 15 hour range makes a daylight train on the route a plausible prospect with a running time on par with the Palmetto.
3) San Antonio-Houston-New Orleans. New Orleans-Houston is a run of 363 miles that takes 9:18 (or 558 minutes). There's a 37-minute hold at Houston, and then the train takes another 5:10 (or 310 minutes) to travel the next 210 miles. Combined, the run is 573 miles in 15:05 (or 905 minutes), for average speeds of:
NOL-HOU: 39.0 MPH
HOU-SAS: 40.6 MPH
NOL-SAS: 38.0 MPH
Let's allow a moment to stew over how bad those speeds are and shoot a dirty look in the direction of UP and SP. While I understand that UP isn't exactly keen to allow improvements here, assuming 50 MPH on each leg (plus a cut-down pad...let's say 15 minutes), you'd get:
NOL-HOU: 7:25 (1:53 saved)
HOU-SAS: 4:12 (0:58 saved)
NOL-SAS: 11:52 (3:13 saved)
Getting this to 60 MPH gets you:
NOL-HOU: 6:03 (3:15 saved)
HOU-SAS: 3:30 (1:40 saved)
NOL-SAS: 9:48 (5:17 saved)
NOL-SAS becomes an easy daylight run under such a schedule, HOU-SAS actually becomes seriously marketable as a corridor service, and NOL-HOU is a workable service as well.
My point with this is to note that those LD trains, with improvements, easily become more sellable to a lot of market segments. If taking the train is on par with "straight" driving time but you don't have to stare at the road for 15 hours at a go to pull it off (or blow large parts of two days), you have a selling point. If you can leave your originating city after work and arrive at your destination just after breakfast, that's also a selling point. And yes, I strongly believe that with substantial improvements such as these, some routes (such as CHI-DEN) could spin off second trains (or at least large second sections/"drop" sections of the current trains), particularly when intermediate stops come into play. Heck, you've already got a nascent version of this in the MSP car on the Builder and the occasionally dropped sleeper in Denver on the Zephyr.
I think the Acela improvements are perfectly valid to spend money on, yes, but I also always get nervous at seeing lots and lots of rail money going into a single project.