“When the driver starts the ignition, the breathalyser immediately measures the content of the alcohol in the breath,” he says.
The information is fed to a sensor that triggers the engine to stop if the alcohol level is high.
The engine cannot be switched on as long as the drunk driver is on the steering wheel.
A parallel system that measures the level of noise in the vehicle works in a similar way but instead of a breathalyser it has a microphone which converts sound into a direct current before sending the pulse to the microcontroller.
Mr Menjo, a fifth year telecommunications and information engineering student at the Multimedia University of Kenya (MMU), said the ASDS can help stem the rising number of road accidents involving public service vehicles.
He attributes most accidents to drunken driving and speeding.
“The breathalysers (Alcoblow) by the National Transport and Safety Authority (NTSA) only solve part of the problem because you have to be caught driving and because you can’t stop people from drinking, why not stop them from getting behind the wheel?” he says.
MMU students took to the streets two weeks ago to protest the death of a colleague in an accident involving a matatu on the Ongata Rongai route.
His system is fitted with a breathalyser located on either the steering wheel or the side door that can “measure alcohol in the air”.
Mr Menjo says this device can even be concealed from the driver in a PSV.
The system has capabilities that can notify the vehicle owner and the police about the exact location of the vehicle.
More than 1,602 people died from road accidents in the first six months of this year, according to NTSA.
These are 89 more compared to the same period last year. Mr Menjo says his innovation could help to reverse this trend
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