Couple things wrong here:
High beams are NEVER used to communicate in trucks. Always turn lights off and back on OR on then back off. However, due to the stringent policy on this Mod, proper use may not be allowed.
"Left, Right,Left, Right" turn signals for "Thanks you" Again. this is wrong. Thank you is either turning off your Marker lights (which ATS does not allow) or using your fourway flashers for 5 to 10 flashes.
Anytime a horn is warranted, it should be your airhorn. Unless in a town/city that restricts it's use.
Not MPs fault but, there are MANY bugs in ATS that prevent it from being realistic in any way other than you are driving a truck, pulling a trailer.