I thought that this was a duplicate thread, given that there is already a thread for ATT lap records as driven in BeamNG:
However, that is not the case here, since the objective this time is not to use BeamNG, but the test track tab in Automation to determine the lap time, as stated in the OP:
And there should not only be an overall lap time competition, but also mini-competitions within car, era and price classes as well.