У вашего броузера проблема в совместимости с HTML5
Lag free!
The ALX400 engines are based off of the ALX's in Cumbria, which are Trident 2's. I don't know the name of the engine itself but you can listen to them in this video: (Credit - South West Transport News)
https://www.youtube.com/watch?v=azuQNnvh184