Where are the details to back up this call to action? I want to see how much more financially productive it is to replace a stroad with a separate street and ro

Where are the details to back up this call to action? I want to see how much more financially productive it is to replace a stroad with a separate street and road. I see these commercial through roads all over, they handle so much traffic compared to streets, it's hard to believe they decrease value in medium density population areas.