Plans to introduce a special device that can detect if a motorist is getting behind the wheel while under the influence of drugs have been dismissed by the Government.
Former road safety minister Tory Christopher Chope had called on the Government to give the green light to the roadside "drugalyser".
He said convictions for drug driving are comparatively unusual due to the lack of a test.
Under current legislation, police are allowed to conduct roadside drug tests, but the Home Office would need to approve a device to enable them to do so.
However, crime and security minister James Brokenshire rejected his Drugs (Roadside Testing) Bill, saying the move is not necessary.
The proposal was supported by many who think a roadside testing device would help to tackle the issue of drug driving.
RAC motoring strategist Adrian Tink said: "Drug driving is a major issue that isn't going away under the present legislation.
"Roadside drug testing kits need to come in sooner rather than later in order to act as a real deterrent and help get these high risk drivers off the road."
Copyright © Press Association 2011