Motorists who listen to music in their car believe that singing along to their favourite tunes helps them drive more safely, according to a new report today.
Music helps to soothe drivers, making them more relaxed and calmer, a survey of 1,780 people found.
Easy listening, classical and rock music is most likely to help drivers concentrate, although other forms of music, such as dance or house or highly emotive songs could divert motorists' attention.
One in four of those questioned for the survey by by Privilege Insurance said music helped them concentrate.
Dr Nicola Dibben, a music psychologist from the University of Sheffield, who carried out the study on behalf of Privilege, said music was more effective than silence, conversation, or talk radio in achieving an optimal state of alertness.
"Singing while driving stimulates not only the mind but also the body which in turn produces heightened alertness and reduced fatigue.
"Singing may be less distracting than conversation because drivers recall words to songs they already know, or because it is fairly easy to learn the words to music where it uses repeated lyrics."