Did you achieve anything? Maybe.
Did you get their plates? Yep.
Did you report them for attempted murder at the local police station? Yep.
Did you get his number- cinema sat?
Did you put on clean pants?
Job fucking done.
The cops might not do shit, but that fuck head's details are on record so if he does something again to another cyclist, he/she has a prior mark against their name.
Marshal law rules!