Hi, does anyone know how ATC system works? I tried to play with it on Boston Sprinter on board of ACS 64 but i had some problems: for example if i'm running at 125 mp/h and the ATC suddenly shows me the maximum speed is 90 mp/h when i go over a flashing green signal, i press the confirm and i begin slowing but after 5 seconds the ATC system sounds again and the emergency brake activates. So i don't have the time to join that speed's limit. Is it normal the time of reactions is very little? Can anybody tell me how it works?