Comment 1 for bug 1613304

If I remember the code correctly, in explorer mode, the path is calculated on a distance of 5 km.
That's why, on HSL, the routes are not set soon enough and the train has to slow down.
On such high speed lines, you need at least 10 km clear in front of the train.

Increasing the distance value won't solve the problem. As in the activity mode, we need to use the SignalNumClearAhead variable to know how much signals must be opened in front of our train.

I already talked about this problem here : http://www.elvastower.com/forums/index.php?/topic/27482-signals/