One 'quick' idea

One is driving and suddenly sees red and blue light flashing behind.. cops pull over the car and accuse the driver of overspeeding. In countries like US, they have a 'radar scan' to support their claim, but what about in developing countries? I am not aware of such hi-tech monitoring systems. Moreover, one often encounters speeding vehicles in the absence of any cop car. Assuming that speed kills and is dangerous, I thought of an accessory. On the week when a 'fast movie' (Dhoom 2) is released, I think the timing of this post is appropriate..

The device is electronically attached to the speedometer and has a 'short term memory' of about 30 minutes. What it does is, it memorizes the speed of the vehicle for the past 30 minutes. Suppose you notice a dangerously speeding vehicle running scot-free.. all you need is to call the cops, and give them some useful descriptions about it.. (like the road, vehicle's color/make, number, whichever helps identify that better). The cop patrolling nearby would be able to trace the vehicle. Most cars slow down upon seeing a cop car; even the culprit might have.. but then the cop pull the car over and then clicks a button, my device (call it, say 'speed-monitor') plots the speed of the vehicle for the latest 30 mins, and the driver gets a ticket. How cool is it?

There could be some complications, like, e.g., speed limits vary on a single road; they obviously vary depending on the type of the road; but, still, if the plot shows a speed of 85 or above in any road, it is an offense, rite? I have a feeling that it shouldnt be too difficult to design such a gadget.. and it can be made tamper-free/fool-proof as well.. Like how it is mandatory to get insurance/registration, and in some cases, inspection done from time-to-time, having this device could be made mandatory by a State/Federal law. I am sure it would keep the 'fast people' on check and reduce accidents.