We need a gadget to detect fatigued drivers on our roads.

Although we already have Alco-blow that tests drink-drivers, nothing has been invented to catch those who drive day and night without any rest.

Other devices, which the world should invent, include a gadget that detects drivers who smoke excessive bhang or use dangerous drugs.

The immediate effects of taking bhang and other hard drugs include rapid heart beat, disorientation, lack of physical co-ordination, depression or sleepiness.

The National Transport and Safety Authority has only been concentrating on beer but should now stretch its dragnet.

A device to detect bhang or drug abuse in drivers would also curb accidents.

Nacada boss John Mututho recently warned that he would deploy undercover officers this month to different bars and pubs to monitor and arrest those who drink more than one beer before setting off. We hope the same enthusiasm used in nabbing drink-drivers would be replicated.