hahah .. from what i see ah .. at highway itself also got 4 type of speed range liau , usually fast lane will kena hog by some ppl who love to take their sweet time cruising so will be 80kmh - 100kmh, middle lane 90 - 120kmh ( ppl start overtaking those who hog the fast lane) slow lane 110 - 140kmh ( fast car will start racing at this lane cause minimal car, usually all the slow car already move out and hog the fast lane, emergency lane >140kmh cause some really fast car and crazy +desperate driver will use that lane to overtake those fast car at the slow lane due to the matter of both fast and middle lane is hog by average speed drivers.
*lol this is just a joke, hope that no one get offended here. cheers*