I guess I am the only one that saw the Mythbuster episode where they test the 4-way stop to the roundabout? Roundabout is 20% more efficient (or something like that) than the 4-way.
But - and this is just like the issue with completely moving the US to the metric system - the problem with removing the 4-way and replacing it with the roundabout is the cost. Something like 400k 4-way intersections or something like that and because the States would be involved, the contracts would be given to friends of the politicians where they increase the cost 1000%. And this isn't taking into account the additional real estate that will be required to create the roundabout as they typically take more land.
Same thing for the metric system. The cost associated with converting all the street, highway, and freeway signs is between 1 - 3 trillion dollars.
Both projects would be good work though, that's for sure.
But - and this is just like the issue with completely moving the US to the metric system - the problem with removing the 4-way and replacing it with the roundabout is the cost. Something like 400k 4-way intersections or something like that and because the States would be involved, the contracts would be given to friends of the politicians where they increase the cost 1000%. And this isn't taking into account the additional real estate that will be required to create the roundabout as they typically take more land.
Same thing for the metric system. The cost associated with converting all the street, highway, and freeway signs is between 1 - 3 trillion dollars.
Both projects would be good work though, that's for sure.