A Road speed limiter (RSL) or speed governor means a device whose primary function is to control the fuel feed to the engine, in order to limit the vehicle speed to a preset value. This is mainly achieved through various methods, like solenoid valve based fuel control, control cable based accelerator pedal linkage control, electronic pedal voltage adjustments or direct ECM control. 

The most used type of speed limiter in United Arab Emirates is electronic pedal interface type device, other wise called as a drive-by-wire (DBW) system which is a complete electronic device. The signal from the electronic accelerator pedal is read by the system and supplied back to the vehicle ECM, till vehicle speed exceeds the speed limit. The system will control & adjust the voltage level given into the vehicle ECM, in order to keep the vehicle speed under the set limit.

In UAE, it is regulated by the Government autorities to use speed limiters in certain category of vehicles where the speed limiting devices should be approved by ESMA. Thinture speed limiters are approved by ESMA and is distributed by Retronics LLC in UAE. Auratraq is one of the approved reseller for installing and issuing certificate of installation.