Who Can Determine if a Patient Can Drive
The treating physician (either a general practitioner or neurologist) serves as the initial evaluator of driving fitness, but the final legal authority to determine driving eligibility rests with the driver licensing authority (e.g., DVLA, DMV, or prefect depending on jurisdiction). 1
The Two-Tiered Evaluation System
Initial Evaluation: The Treating Physician's Role
The treating physician performs the first-line assessment of driving fitness in the majority of guidelines (8 of 15 reviewed guidelines). 1 For neurological conditions like Parkinson's disease, the treating neurologist is considered the most appropriate initial evaluator because they both "know the disease" and "know the patient," allowing them to objectively assess motor and cognitive components critical for safe driving. 1
The initial evaluation should include:
- Motor function assessment (proposed in all 15 guidelines reviewed)
- Cognitive assessment (proposed in 13 of 15 guidelines)
- Visual examination (proposed in 8 of 15 guidelines)
- Clinical and driving history review
- Medication review for sedating or impairing effects 1
Trichotomization of Drivers
Based on this initial evaluation, the treating physician categorizes patients into three groups:
- Safe drivers - cleared to drive with periodic reevaluation
- Unsafe drivers - should not drive
- Undetermined cases - require second-line evaluation 1
Second-Line Evaluation for Undetermined Cases
When the initial assessment is inconclusive, the treating physician refers patients for second-line evaluation (recommended in 14 of 15 guidelines, 93%). 1 This may include:
- Practical on-road driving assessment (proposed in 12 of 15 guidelines, 80%)
- Multidisciplinary team evaluation
- Specialist medical assessment (e.g., PD specialist)
- Driving rehabilitation specialist assessment 1
Importantly, even after second-line evaluation, the final clinical decision about driving fitness still lies with the treating physician, who must incorporate these results into their overall assessment. 1
Ultimate Legal Authority
The treating physician's role is purely advisory. 2 The physician cannot legally authorize or prohibit driving—this authority rests exclusively with the driver licensing agency (DVLA in UK, DMV in US, prefect in France, etc.). 3, 4
The treating physician can:
- Refer patients directly to the driver licensing authority (recommended in 6 of 15 guidelines, 40%) 1
- Recommend conditional licenses with restrictions (vehicle adaptations, daylight-only driving, limited radius) 1
- In some jurisdictions, has a legal obligation to report patients deemed unfit to drive, which overrides patient confidentiality 5
Critical Caveats
The treating physician is NOT authorized to perform fitness-to-drive assessments for their own patients in some jurisdictions (e.g., France requires approved/licensed physicians separate from the treating physician). 3 This varies by jurisdiction.
There is no shared confidentiality between the treating physician and the medical licensing authority—information disclosed for driving assessment purposes is not protected by the usual doctor-patient confidentiality. 3
Physician Liability Considerations
Physicians face potential legal liability from two directions:
- Patients may sue if physicians fail to counsel them about driving dangers associated with their condition or medications 5
- Accident victims may sue if courts determine the physician could have foreseen the danger of the patient continuing to drive 5
This dual liability risk underscores why the physician's role is to assess, advise, and when appropriate, report to licensing authorities—but not to make the final legal determination of driving eligibility.