No drones.

[Max Headroom]

Another land owner who doesn't know he doesn't own the airspace above his land.





Ouse Valley Viaduct
Bridge in England

 

[Yorkshire_Pud]

Railway lines and their immediate surroundings might have some 'protection' though I am prepared to be corrected about that. You might want to look into that.
Either way I wouldn't fancy getting a high speed train train running into the drone's rear or sides, then there is the question of whether or not it would go throught the trains windscreen.

 

[AeroJ]

Someone should contact the site manager and challenge that - I don't think there is any legal basis for it.