jamesinclair wrote:"High speed" is relative. It's a subjective term.
Most americans are familiar with car speeds and have no idea at what speed trains move.
The highest speed limit for cars in the country is 80mph, but in most urban areas, speeds top out at 65mph.
So anything faster than that is "high speed" because the speed is indeed higher than the comparable surface transportation option.
Also, most people's experience with trains is waiting 5 minute while a freight train moving at 7mph crosses the street. I think if you tell someone that most amtrak trains reach 79mph they will be surprised and impressed. The general perception is that american trains are always slower than cars, which most people attribute to speed and not the route.
So with the perception that trains move at 30mph and cars max out at 65-80mph, I think it is perfectly reasonable to consider 90mph high speed and certainly 110mph.
It doesnt matter what China or France is doing, most americans will never ride those trains or take the time to read up on them. When using a subjective term you must always rely on what people know, not what exists.
What if the terms were
High speed = 90mph
Higher speed = 125 mph
Highest speed = 170mph.
Would the OP be upset about this?
No, I think the problem is just the opposite. They hear about Acela going 150 from Boston to Washington, and then wonder why they can't get between Boston and NYC or NYC and Washington in 2 hours. They don't understand that it doesn't really do 150mph most of the time. I'm not sure a lot of Americans really think about our rail network, and think that many tracks are not as active as they actually are, but I don't think that applies to the speed of trains.
On the other hand, they are looking at the newspaper and seeing articles about China and wondering "gee, why don't we have one of those, they look kinda cool".
And no, I would not be happy with that. If a Gennie and Bomb coaches can do it, it's not high speed anything. That's a commuter train, plain and simple. So that takes us to at least the 125 speed to call it high-speed, and I'm not even a fan of having toasters considered high speed. I love them toasters, but they just don't go that fast, even though technically they are.
I would say there should be three classes of high-speed (these seriously need better names though):
1. regular passenger train high-speed. It's a toaster and Amfleets with ATC on the appropriate track. They do 125.
2. mixed-use track true high-speed. It's Acela using ACSES, but on shared, mixed-used track.
3. modern high-speed. It runs mostly on an LGV, except for city terminal access at the major cities. It's top speed is 220, but it is likely limited to 125 on shared track since it wouldn't be tier II compliant.