Gardaí urge motorists not to engage in very common habit
It could hamper Gardaí stopping dangerous drivers
Gardaí in have urged drivers not to warn other motorists of upcoming checkpoints.
"Garda checkpoints detect a large number of serious motoring offences including no insurance, disqualified drivers, intoxicated drivers, defective vehicles and indeed criminals going about their business, en route to or from a crime," Gardaí said in a statement.
"There is a tendency for some people to flash a warning to say 'guards up ahead'. The driver then has the option to take an alternative route.
"If you have nothing to fear from our checkpoints, please don't warn others who may! Food for thought?"