You need 2.4 km of clear road to now overtake

Rodney Hide does the calculations:

Overtaking on the road safely and within the law is now all but impossible.

The speed limit on the open road is 100km/h. The police are applying zero tolerance. You can now be ticketed at 101km/h. The speed limit for heavy vehicles and cars pulling caravans, boats or trailers is 90km/h.

Do the maths. In good driving conditions we are advised to apply the “two-second rule”. At 90km/h that’s 50m. So you pull out 50m behind a truck and trailer, the truck and trailer is 20m long and you pull in once safely 50m past. You have to make 120m to pass safely.

If the truck is doing 90km/h and you stick to 100km/h it takes 43 seconds to gain that 120m.

At 100km/h you will have travelled 1.2km. You must allow for a car coming towards you at 100km/h. To pass safely you need 2.4km of clear road.

This is why there is a tolerance – to allow for situations where it is sensible to temporarily exceed the speed limit.