I have driven alot on Lhr-Okara-Multan-Bwp-Ryk GT road in night fog. I used to drive on the white line which separates the lane keeping speed of 60km/hr, this way i would know which way the road is turning. very soon i would get a line of cars behind me. driven for almost a year like that, never had an accident.
On motor way, i sometimes drive in the fastest lane during fog at night because i know no one else will be driving there. But usually i drive on the dotted white lane separator of the first and second lane, speed around 70km/hr. no accident.