The key to any "safe" driving behaviour is to leave yourself an escape route or range of options should conditions change i.e. if one of the incompetents around you does something unexpected. Never compromise your safety or that of others by your actions.
I use the inverted commas because I know I push boundaries, but there's 23 years with one significant road accident, IAM and IAMC, PSV1....
.... and in the case of the one accident, a witness following could not believe I avoided a head-on smash at a closing speed (legal) of 120mph when an approaching car made an overtake right in front of me. Even then, I had an escape route which, although the car was damaged, meant that everyone emerged unhurt.