[malyk]

It's definitely about the specific businesses that are on the one way street. And I might recall (been awhile since I read the book), that he specifically used the example of changing from two way to one way and that the result is businesses on the affected street lost revenue.

It makes intuitive sense. When a street is two way cars pass by both directions each day increasing the likelihood of stopping at a store on that street. When streets are one way, then stores only get people driving by once a day, and so they lose revenue.