You could require them to register as commercial vehicles. You can enforce using physical barriers or punishing fines/use fees for people that don't enter the area with a fare. Taxis can only go in certain parts of airports, rideshares have designated pickup zones, it seems to work fine. Or you just say that one of the downsides of being a part time driver that isn't part of a regulated fleet is that you don't get to congest downtown areas.
In Granada Spain I noticed that certain parts of the old city had physical barriers that could only be passed by a vehicle with the right NFC pass. Generally taxis, busses, and a few private cars that seemed to belong to people with property in the area. It made it very pleasant to walk around the old streets without having to suck down exhaust fumes of idling cars.
As you noted, Uber is a newer service, plenty of people happily lived their lives before it existed.
In Granada Spain I noticed that certain parts of the old city had physical barriers that could only be passed by a vehicle with the right NFC pass. Generally taxis, busses, and a few private cars that seemed to belong to people with property in the area. It made it very pleasant to walk around the old streets without having to suck down exhaust fumes of idling cars.
As you noted, Uber is a newer service, plenty of people happily lived their lives before it existed.