The IAM (Institute of Advanced Motorists) has warned high mileage drivers that it could be dangerous to rely on caffeinated drinks, which it says can even lead to increased weariness.
The IAM points to research showing that just an hour after drinking a highly caffeinated and sugared drink, tired drivers can experience serious lapses in concentration and slower reaction times as the drink wears off.
The US National Safety Commission (NSC) has issued an alert for those driving under caffeine intoxication, similar to warnings associated with drinking alcohol and driving.
Neil Greig, IAM director of policy and research, said: “Energy drinks are good as a quick fix, but they’re no substitute for regular breaks. Having a high-caffeine drink is a one-off hit – you can’t repeat it, as this type of drink does not produce the same effect in a couple of hours’ time.”