They used to sell a little strip of conducting rubber that trailed from the car's rear bumper to just touch the road. This was supposed to discharge static from the vehicle. Did it work? I dunno, I was only ten at the time, but they looked like a good flashy product for taking money off mugs!
Man-made fibre is the problem. Try cotton, wool or /mix socks, shorts and pants. You can actually buy conducting shoes, [not recommended for electricians though!], or try leather soles. Natural products like wool, cotton, linen etc., conduct well because they contain water mechanically locked into the fibers. They feel nicer to wear too, IMO, although leather soles wear out fast. My dad used to hammer iron studs into the soles and heels of his work boots to prolong their life, anyone remember them?
The idea is for both the vehicle and you to be at the same potential as the street.
Wood work but can't!