CO2 of a SCM

Hello you! I’m looking for emission values of trucks. I’m looking for, especially with regard to CO2, the emissions of a normal tractor 1) on the motorway and 2) on the stand gas/stau. It would be great if the values were also a) in empty condition and b) loaded. I realize that the values per tonne of payload change. And that a Scania may emit differently than a Volvo. I’m really only talking about average values, i.e. Value, what an SZM in the traffic jam / stationary gas blows up important. I hope one of you can help me with something… Thank you and best regards, Georg