I'm not sure if I am reading the LIRR ATC correctly, but there seem to be times when the ATC speed indicator and the HUD speed limit do not agree. The ATC indicator on the train and the HUD always agree, but the speed limits shown by the HUD do not. The ATC might say you can drive at 40mph but the speed limit on the HUD is less and if you drive over the speed the HUD shows then you get penalised. There is also the converse where the HUD shows a higher speed and the HUD shows a much lower speed. If you drive over the ATC speed then you get a penalty brake. I would expect the ATC and the HUD speed limits to always agree. Lirr Hud Lower Than Atc by paul.pavlinovich posted Sep 13, 2020 at 9:27 AM Lirr Hud Higher Than ATC by paul.pavlinovich posted Sep 13, 2020 at 9:27 AM Additionally, there are places (particularly around PEN station) where the ATC jumps from 15 to 60 back to 15 as you move across points/switches/junctions..