Speed up editing

I want to edit routes that are 100+ miles long but to edit you have to run the routes to find the problem. Any help would be appreciated.

I am not anywhere near my Trainz computer (it is currently on the other side of the world!) so I cannot check but there are settings in the Main Menu and in the Launcher Trainz Settings tabs that will allow you to run your trains at supersonic speed by holding down the shift button. Bewarned though, this can cause problems with some rules and driver commands.

Settings > Developer > Enable Advanced Debug Tools. That will enable you to speed up the Locomotive to very fast by holding down the shift key when in driver.