Traffic

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BoogieMonster (January 18, 2018, 12:58:38 PM):
The point is to have an on/off-ramp that doesn't take much space, so you could build it in otherwise impractical places.
st0nes (January 18, 2018, 13:38:35 PM):
I've seen novel highway exit designs before. Stuff like this. But it all comes down to cost and real-estate.

Traffic joining the freeway from the on-ramp into the fast lane is not a good idea. There's one like that on the M3 in Cape Town, and it's bloody dangerous; there are loads of accidents there when some old tjorrie saunters onto the freeway in front of a hurtling Aston Martin...
BoogieMonster (January 18, 2018, 14:18:27 PM):
Guess it comes back to Mefi's point... I seen on/off ramps like that in the USA, but then their drivers seem far more proficient in general.
Tweefo (January 19, 2018, 09:58:12 AM):
Many millions (billions?) was spent during the Joburg highway improvement project a few years ago. It mainly added lanes (and gantries). Did it improve the traffic? For a short while, yes, but now it's back to the same old story. I believe this happened all over the world, so by the time they decided on this project the data was there - adding lanes does not alleviate the problem. You just get more cars. One morning I was stuck in the left lane on the N1 trying to get off at William Nicol. I joined the left lane about 2km before the ramp. Cars, mainly taxis, would pass on the right and then push in just before the exit, resulting in us, law-abiding travelers, having to wait, and it also brought that lane to a stop. It took me something like 50 minutes to get off. Some of that time was spent sitting underneath the M71 bridge where it crosses over the N1. There is space for an off-ramp. This is quite a major road, so some of my fellow, waiting in line, travelers would have ended up on it. Also, you get the William Nicol ramp but then it is 16 km before Malibongwe. 16 km on some of the highest traffic density areas in the country. The whole idea of highways is to get the traffic to flow. To get the cars off it as soon as possible make sense to me. Don't make it easier to join the highway, because then you'll only get more vehicles on it, and then it's back to the same problem.
Rigil Kent (January 19, 2018, 10:35:45 AM):
PE had its problems too. The angst from the big pile-up of '96 is still fresh in people's minds. Two lanes blocked by that jack-knived donkey cart, and Sewende Laan about to start.

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