No it's not, because the cops get there and the bus already left. Or the cops wait around but the bus is stuck in traffic and another call comes in so the cops give up and leave. Trying to pick some arbitrary bus stop somewhere between 10 and 30 minutes ahead based on how fast they think the bus is going and how long some cop (and which one?) will take to get from where they are to that bus stop depending on traffic is just a recipe for missing each other. And cops are a scarcer resource than buses.
Like, if there's a serious crime is being committed in a moving vehicle then sure they'll have someone constantly monitoring and redirecting in order to intercept. It's possible, with high enough priority. But someone not paying a fare does not have that priority.
And the point is the person refuses to get off the bus right away. They stay on it till they get to their destination and then get off.
There's absolutely no need to wait for the cops. They can drive to a stop in front of the bus.