Why would companies be building roads like that when there is no need to do it?
>"Worldwide you don’t see companies building such things even when the demand is there."
This would be interesting to look at, where is there demand for roads?
Need is a poor way of looking at investments. Having a more direct route reduces travel costs. Which is while people use Toll Road‘s even when their are generally other options.
If you want to make the suggestion that companies will make toll roads you need to explain why the don’t even when their are many profitable bridges etc. Toll bridges could be profitable in many places yet they are not built largely becase the cost is so extreme.
As a result, people are not willing to pay much for more roads, so they aren't going to be built. It may not even be legally possible in many cases under current regulations.
But, individual roads fit into a larger context. If you want to get from A to B and there is a road from A to C and from C to B then the utility is limited to time saved. Companies rarely build such roads and it’s even rarer to see them turned into public toll roads.
The US interstate highway system for example provides minimal individual benefit over existing roads, but massive collective benefit. Worldwide you don’t see companies building such things even when the demand is there.