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Published on Nov 30, 2023


The Dynamic Speed Governor is a system that can be implemented effectively for an efficient and perfectly controlled traffic system. This system can limit the speed of a moving vehicle over an area where the speed has to be restricted and retained within a predetermined value. The Dynamic Speed Governor consists of mainly two parts, the Transmitter section and the Receiver section.

The transmitter section is mounted on the signal board, on which the speed limit over that area is indicated. Receiver section is kept inside the vehicle. The radio frequency signal from the transmitter is transmitted and the receiver receives it.

If the speed of the vehicle is greater than the speed limit proposed for that particular area, which in turn is transmitted by the transmitter section, the speed governor comes into action and restricts the driver from going beyond that rated speed. If the system detects that the speed of the vehicle has gone beyond the speed limit, a signal is generated from the dynamic speed governor circuit.

This signal in turn is used to drive the mechanical part of the vehicle, which closes the fuel nozzle of the vehicle thereby restricting the vehicle from going beyond that speed. In this particular reproduction of the system, to indicate the signal produced, the signal output from the circuit is used to trigger a monostable multi - vibrator, which in turn sounds a buzzer.

Dynamic speed governor is designed with the aim of dynamically limiting the speed of the vehicle to a preset value, when the driver drives through an area that has a preset speed limit, thereby encouraging safe driving and preventing accidents.

The main idea is to transmit the speed limit for the area to the vehicle, as it approaches an area that has speed restriction, so that the driver can be warned and the speed of the vehicle is automatically reduced. The system is implemented with the help of a RF transmitter that transmits a speed limit to the approaching vehicle, and an RF receiver inside the vehicle that accepts the incoming signal and then feeds the speed limit as one of the inputs to a comparator.

The other input of the comparator comes from a digital tachometer. When the comparator detects an input speed that is greater than the speed limit received by the RF receiver, it will trigger off a chain of reactions that induce the mechanical functioning of the vehicle to automatically bring down the speed of the vehicle to a range in tandem with the preset value and thus the desired results are obtained from the system.


The primary design criteria for this project work were as follows:

• Incorporate easily available components

• Use cheap and easily worked materials platform

• Minimize the weight of the unit

• Maintain a level of robustness

• Bring about solid design and construction features

• Limit the consumption of energy

Modular design