Stevek76 wrote:
By making it not exist.
The cycle lanes would be physically separated
That does not make the problem go away it makes it much much worse.
The problem in this case is caused by the cyclist arriving on the scene from an unexpected position.
Riding on side paths cyclists are coming from directions that are more unexpected. It is exactly this sort of collision that side paths are knoiwn to excaserpate - making crashes three times more likely riding with the flow of traffic and a whopping ten times more likely when those paths are two-directional.
Knowing about the inherently dangerous nature of the concept you can do all sort of things to attempt to mitigate it -(bending it towards the carriageway, bending it away from the carriageway, merging it with the carriageway, painting it red, putting it on a speed bump, making cyclists give way, making cyclists dismount, pulacing barriers on the approach and so on). The measure that does make a significant difference is to ensure that the path is single direction with the traffic flow - reducing the increased crash risk to a factor of 3 rathar than 10.
However, the only way to make the problem not exist is to not route side paths across at-grade junctions. Given the basic geometry you have only 3 options.
1. Grade separation (suitable for high speed rural roads with few junctions)
2. Close the junction to motor traffic
3. Keep cyclists on the carriageway