Will a Signal Free Ring road be possible in Bangalore? Well I think so if the following idea is implemented (see image below).
The solution is to build Two 'C' shaped bridge across the highway/ringroad on either side of a junction. Each Bridge will be a one way. As show in the illustration, a person who wants to cross across the ring road, can take a free left turn, climb up the ramp and land on the other side of the road. From here one can either go straight or take a free left turn and enter the cross road.
Following are the advantages of the C shaped bridge
- Take U turn with ease without affecting traffic flow
- Every point is free left - so no signal required
- Traffic flow on ring road will be non-stop
- Entering into ring road is always a free left turn (no matter if one has to go right or left)
3D View of the flyover.
In case of an underpass, vehicles plying below may flow smooth but on top of it, a signal is very much required. Also the work involved for an underpass is time consuming and might cost much more compared to this system.
The idea described here holds good only for Ring road or any other highway. This method might be difficult to implement within a city.