You are not supposed to exceed the speed limit on the highway when overtaking. If the speed limit is 130 km/h and you're already driving that you have no use for overtaking.
I mean unless you want the overtake to take a long period of time (which can be dangerous when you're on a one lane road and have to go into the oncoming lane to overtake), it's better to exceed the speed limit briefly during the overtake and spend less time in the oncoming lane. Obviously don't blast past trucks/trailers at 160km/h/100mph+, but briefly going 5 or 10 over during an overtake of a long truck/trailer is fine, and better than spending more time in the oncoming lane.
If you are not sure you can overtake someone safely within safe speeds you shouldn't overtake them in the first place. And yes, that means sometimes you'll be driving 75 km/h on a 80 km/h road. That won't kill you and won't affect your life negatively, we're talking about five extra minutes of travel time on a 100 km stretch.
But it's not driving 75km on an 80km zone. It's being stuck behind a 40 meter/ 120ft long truck going 80-90km/h in a 120km/h road. Obviously only perform an overtake when it is safe to do so, on a straight section of road with good visibility, no blind turns, crests, fog or mist. Rarther spend time behind the truck or slow vehicle, it's much better than risking your life for an overtake. But it's still preferable to spend as little time in the oncoming lane as possible, especially when overtaking such long truck/trailers with 30+ wheels. South Africa has a 10km/h speed limit tolerance both for this and other reasons (speedometer inaccuracies, etc).
You are not supposed to exceed the speed limit on the highway when overtaking. If the speed limit is 130 km/h and you're already driving that you have no use for overtaking.
I mean unless you want the overtake to take a long period of time (which can be dangerous when you're on a one lane road and have to go into the oncoming lane to overtake), it's better to exceed the speed limit briefly during the overtake and spend less time in the oncoming lane. Obviously don't blast past trucks/trailers at 160km/h/100mph+, but briefly going 5 or 10 over during an overtake of a long truck/trailer is fine, and better than spending more time in the oncoming lane.
If you are not sure you can overtake someone safely within safe speeds you shouldn't overtake them in the first place. And yes, that means sometimes you'll be driving 75 km/h on a 80 km/h road. That won't kill you and won't affect your life negatively, we're talking about five extra minutes of travel time on a 100 km stretch.
But it's not driving 75km on an 80km zone. It's being stuck behind a 40 meter/ 120ft long truck going 80-90km/h in a 120km/h road. Obviously only perform an overtake when it is safe to do so, on a straight section of road with good visibility, no blind turns, crests, fog or mist. Rarther spend time behind the truck or slow vehicle, it's much better than risking your life for an overtake. But it's still preferable to spend as little time in the oncoming lane as possible, especially when overtaking such long truck/trailers with 30+ wheels. South Africa has a 10km/h speed limit tolerance both for this and other reasons (speedometer inaccuracies, etc).