Car Speed governer (speed limiter)

Can any body guide me on circuit used to control the vehicle speed.

what is your existing setup

hi,

your question does not specify the details of the existing system of the vehicle and how and why you want to change it.

abhishek

I just want to know a circuit used to control the spead of a car to certain amount. Forinstance in the graded road I want the car to move at a speed of 80KM/P BY stoping the fuel to the engine, and on black top road I want the car to speed up to 100KM/h. This is the idea am looking for.

The biggest problem you've got is.......

How is the car going to know what speed it is allowed to do when it's on a particular road ????