Semi-Autonomous Radar Detection Range Extender

Inspired by the Predator UAV, only smaller and not entirely remote- controlled (you can deploy it, tell it to extend/shorten its range, recall it manually), this stealthy little guy flies a good distance ahead of your vehicle, using various sensors to stay a good distance above traffic/obstacles yet low enough to detect police radar, and equipped with a radar detector, which picks up radar long before it pings your vehicle, and alerts you one of two ways: a wireless signal that triggers an audible tone inside your vehicle, or a bright LED cluster in the rear. The great thing about it is that you could use these in areas where radar detectors are illegal because even if it is spotted by a cop they have no way of proving who it belongs to. Give it VTOL capability and if you get pulled over, tell it remotely to go fly to the limits of it's signal-tether range and go to ground until you start moving again, deploying guard-shrews on leashes to protect it. Obviously best used in open areas, and not recommended for use in city limits.

Mass production might reduce the effectiveness of this, but it would probably be so expensive most folks couldn't afford it or wouldn't be willing to spend that much money on something like this, anyway. This could probably be made quite simply with a remote-controlled model plane, some fancy software and sensors, and a simple radar detector, the fancy software and sensors being the most expensive part. If it gets low on fuel, just recall it to it's docking station in the trunk, where it can refuel and redeploy.