Out in Seattle’s Northgate district, they have made some of the side streets one-way. Where the side street used to lead on-to and off-of the arterial, it now goes only onto the busy street. As with the traffic circles on Capital Hill, it effectively stops people from using the side streets as shortcuts through the neighborhood and still allows for circulation.
It is cheap to install these types of changes. It is cheap to un-do the changes if it turns out that it doesn’t work. You could probably try it out with temporary signs for even less investment.
We should be trying this all over town; maybe a hundred streets. If it works, a hundred more. And if it doesn’t work, take down some of the signs. No big whoop.