Mod: TACHOGRAPH AETR V1.1 1.34.X
I love this mod!
Two issues:
1) when you re-load an older savegame, drive a little, and then go back to a later save game, it completely messes up the recorded driving and rest times.

2) the calculation for splitting 45-minute-breaks is wrong.

E.g. I drive 4:00 hours, take a 0:15hr break. Now I have 30 minutes of driving time left before I need to take another 0:30hr break. So far, so good. I drive those 30 minutes, take half an hour's break. Now, in real life, I have the full 4:30 hours again, because I've had 45 minutes of rest time. In your mod, I only have 4:00 hours left, because it counts the 30 minutes of driving time since the 15-minute-break towards the second driving period. Worst case scenario, you drive 30 minutes in the morning, take a 15 minute break, drive 4 more hours, take 30 minutes break, and you're left with 30 minutes of driving time before you need to take anouther 45-minute break.