It would depend on whether the driver wanted to keep their job. Doing that would be worthy of immediate suspension without pay, followed by immediate termination as soon as the data recorder readings were confirmed.salopiangrowler wrote:... if they can do it some drivers would no doubt be tempted to go over that maximum as unless its built into the actual locomotive theres nothing stopping a freightliner doing full line speed on a 90mph section.
You also have the issue of wagons only being rated for 75mph, and the issue of increased air turbulence causing infrastructure damage, danger to passing trains and a hazard to people at level crossings and stations. The duty of care that train drivers have to prevent their operations causing harm to people would be a good enough reason to not go over their service speed limit.
) and further to that, I don't think we are anywhere near that sort of performance with RailWorks. 
