We assessed doctors' knowledge on laws and recommendations regarding fitness to drive in certain medical conditions by a questionnaire survey. A total of 646 doctors consisting of 400 general practitioners and 246 hospital doctors of all grades were circulated with the questionnaire. The survey was anonymous so non-responders could not be re-circulated. The response rate was 26% general practitioners and 32% (hospital doctors). The results show the poor knowledge of doctors on several aspects of fitness to drive. It is necessary for all doctors to have a basic knowledge on the laws and recommendations on fitness to drive so that they can advise their patients correctly. Our survey clearly shows that doctors' knowledge is poor. Many drivers may therefore be placing themselves and others at risk. It is mandatory that this subject receives more attention in undergraduate and postgraduate education and that doctors should be regularly updated on new recommendations from the Driver and Vehicle Licensing Agency.