Will be driving from Johannesburg airport to hazyview in december what are the speed limits on this route and how long does it take
I would allow 6 hours including pit stops. It may be slightly more or less depending on the day/time of travel and if any roadworks delays. Speeds are usually 120kph on the N4 and N12 motorways, and 100 on the R40.
On the R40 between Nelspruit and Hazyview there are numerous changes in the speed limit. In some places the speed limit is 60 km/h and in some other parts it is 80 km/h.
You just need to aware that the speed limit does change on these roads and be vigilant for the speed limit signs. Adjust your speed accordingly. so that you don't get caught by a radar or camera speed trap
On our wedding night it took us 8 hours to reach our honeymoon destination in Hazyview. Big problem was the fog on the Long Tom pass. But we have also done it in 4.5 hours on another occasion. Speed limits are not the main reason for slowing you down . . . . . fog, potholes, animals, smoke, slow trucks, etc. and plain safe driving speeds will set your speed.