Why do London Underground trains feel so fast?

I was visiting London the other week and went on the Tube. I was curious at what the velocity of the trains were-I would guess 30-50 mph but it felt more like 80 mph due to the optical illusion of the tunnel. So my question is how do our brains trick us into thinking that we are travelling at greater speeds within

I was visiting London the other week and went on the Tube. I was curious at what the velocity of the trains were-I would guess 30-50 mph but it felt more like 80 mph due to the optical illusion of the tunnel. So my question is how do our brains trick us into thinking that we are travelling at greater speeds within a tunnel?

I appreciate your answers.

Other answer:

green:
London Undeground trains normally travel at higher speeds outside a tunnel. In a tunnel, they can seem faster mainly due to the noise and the cramped nature of the underground, which creates an illusion that everything is moving by very fast.
Zheia:
When you are closer to something it appears to move faster. As a comparison, when the underground train reaches an overground section it will appear to move more slowly. There is less air resistance overground so the train may actually be moving faster.
PQR Theorist:
50 mph is about as fast as tube trains go in the tunnel; 30 mph is a more common speed. The noise adds to the impression of speed.
?:
Tunnels on the London Underground are very close to the train, in particular on the deep level tube lines. That close proximity makes the speed of the train appear greater than in the open air.

Tunnels on the shallow 'cut-and-cover' lines (with the larger trains) are wider and more spacious, so the train speed appears to run a little slower.

AlCapone:
Everything is closer in your view outside the windows, not the wide distant view you might be accustomed to in a car or bus or train. The closer to you, the faster it moves through your field of view, providing a greater sensation of true speed.
Kirk:
I have never been in them. The distances between the wall lights can make it feel faster or slower and the distances between station can also do that.
Joseph the Second:
The greater our Field of Vision, the slower we seem to move. So reduce that "field" to the confines of the Insides of a Tunnel- & it REALLY feels like you're "getting Somewhere- FAST " !! 🙂