That was the reason for the suggestion of relay drones. One reaches the end off its range, and hands off the pursuit to the next drone in a box. With enough drones in a box, you can cover a whole city. That's the current goal of most LEO drone setups.Other traffic is the main reason for calling off high-speed pursuits. Too many innocent people get hit. That's why they have police tarffic helicopters in the first place. They go faster, higher, and farther than drones.