Listening to sports commentaries while driving is as dangerous as drink driving, warn scientists at Britain's Transport Research Laboratory (TRL).
According to the TRL study, reactions can be slowed by up to 20 per cent.
The report, according to The Telegraph, said: "To put this into context, this increase in distance travelled is 10 per cent further than the additional stopping distance when driving with a blood alcohol level at the UK legal limit (80mg/ml).
The number of incidents of hard braking at the last minute almost doubled when motorists were listening to sports commentary.
The report added: "This suggests that the motorists were not paying enough attention to the road and had to make late decision to respond to the conditions and drivers on the road around them."
The researchers noted that most motorists did not recognise listening to sport as an equivalent distraction to arguing in the car or handling stress.
The study followed the reactions of 18 participants aged 25-45 (nine of whom were male and nine female).