They aren't addressing the #1 cause of accidents. People on their cell phones.  Without eyes on the road, you can spend all your resources  on infrastructure and still not make things better. It's the people not paying attention more than the design of an intersection. 

Making a law against the use won't matter either, because everyone thinks they can get away with it. They need to pass a law that all vehicles have hands-free or a device to kill phones in cars. Passenger usage be damned. It is the only way.