A simple solution is to have extra wide bits where the topology allows it, with the width added to the uphill side of the road. Adding an unseparated bike lane on long straighter sections or round the bend is usually going to be sufficient for relatively low-speed mountain overtakes. What you should never do is encourage anyone to overtake a cyclist going downhill.
I’ll add that even in the US, it’s somewhat common for mountain roads to periodically have an extra passing lane, pull-off points, or an extra wide shoulder so motorists can get around slower traffic.
So there’s really no excuse for not adding a bike lane on uphill portions in cycling heavy areas whenever those roads need to be repaved.
…so maybe we’ll see some of that in the next 50 years…
A simple solution is to have extra wide bits where the topology allows it, with the width added to the uphill side of the road. Adding an unseparated bike lane on long straighter sections or round the bend is usually going to be sufficient for relatively low-speed mountain overtakes. What you should never do is encourage anyone to overtake a cyclist going downhill.
Here’s some examples from Australia:
I’ll add that even in the US, it’s somewhat common for mountain roads to periodically have an extra passing lane, pull-off points, or an extra wide shoulder so motorists can get around slower traffic.
So there’s really no excuse for not adding a bike lane on uphill portions in cycling heavy areas whenever those roads need to be repaved.
…so maybe we’ll see some of that in the next 50 years…