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Sleep Apnea and Driving in Belgium: Complete Regulations
Untreated sleep apnea is a recognized cause of drowsy driving. In Belgium, European regulations impose specific obligations on drivers suffering from moderate to severe sleep apnea regarding their fitness to drive. This guide sets out the rules in force.
Why is sleep apnea regulated for driving?
The European directive that governs this starts from a simple finding: untreated obstructive sleep apnea is one of the highest risk factors for road accidents. That is what brought apnea into Annex III of the driving licence directive, through Directive 2014/85/EU of 1 July 2014, which Member States had to transpose by 31 December 2015. It also sets the definitions used everywhere afterwards: moderate apnea means an AHI of 15 to 29 and severe apnea 30 or more, in both cases with excessive daytime sleepiness. A driver in whom moderate or severe apnea is suspected must be referred for authorised medical advice before a licence is issued or renewed.
The two driving licence groups
The regulations distinguish two groups of drivers, with different criteria:
- Group 1 (licence B, A, AM): private vehicle drivers, motorcycles, mopeds. Concerns the vast majority of drivers.
- Group 2 (licence C, CE, D, DE and sub-categories): professional drivers - trucks (≥ 3.5 tonnes), buses, coaches. Stricter standards.
Regulations for Group 1 (licence B - private drivers)
For drivers of private vehicles (licence B):
- Mild apnea (AHI 5-15/h): generally no specific obligation if the driver has no excessive daytime sleepiness. Monitoring is recommended.
- Moderate to severe apnea (AHI ≥ 15/h) with sleepiness: the doctor may declare the driver temporarily unfit to drive until effective treatment is proven.
- Under effective CPAP treatment: fitness to drive may be granted or maintained, subject to medical confirmation of treatment efficacy (controlled residual AHI, no remaining sleepiness).
- Periodic review: for treated moderate or severe apnea, the directive requires a periodic medical review at intervals not exceeding three years for group 1.
Regulations for Group 2 (professional licences C, D)
Professional drivers (trucks, buses) are subject to much stricter fitness standards:
- A diagnosis of moderate to severe apnea (AHI ≥ 15/h) with sleepiness results in a temporary unfitness declaration.
- Effective CPAP treatment mandatory: to regain fitness, the driver must demonstrate effective CPAP therapy with regular medical follow-up. Adequate compliance (generally ≥ 4 h/night average) and a controlled residual AHI are required.
- Regular follow-up: fitness to drive is granted for a limited period, with a periodic medical review at intervals not exceeding one year for group 2.
- The CARA's role: the Centre d'Aptitude à la Conduite et d'Adaptation des Véhicules (CARA) may be involved in assessing the fitness of professional drivers.
The obligation to declare
In Belgium, there is no general legal obligation to declare sleep apnea to the competent authority for group 1 drivers. However:
- The treating doctor or the specialist who diagnoses apnea with sleepiness has a duty to inform the patient clearly of their legal obligations and of the road-safety risks.
- The patient is responsible for not driving while sleepy, whether diagnosed or not.
- For professional drivers (group 2), the occupational physician is generally involved in the fitness assessment.
The role of CPAP treatment
CPAP is the reference treatment for moderate to severe apnea. Effective treatment:
- Eliminates apneas and daytime sleepiness
- Allows the driver to regain fitness to drive
- Must be documented with device data (residual AHI, compliance) at medical reviews
For professional drivers, CPAP data (through software such as OSCAR or the manufacturers' platforms) may be required to prove compliance and treatment efficacy.
Practical advice for drivers with sleep apnea
- Do not wait: if you feel sleepy at the wheel, pull over. Drowsy driving is as dangerous as drink driving.
- Tell your doctor: describe your daytime sleepiness symptoms. Do not play them down.
- Follow your treatment: a CPAP used properly removes sleepiness effectively. Check your residual AHI.
- Keep your data: keep a history of your CPAP data. At a medical review, it is the proof of your compliance and of the treatment's efficacy.
Our CPAP devices available to buy at VivaRespire:
Frequently asked questions about sleep apnea and driving
For group 1 drivers (licence B, A, AM), there is no general legal obligation for spontaneous declaration. However, the doctor who diagnoses moderate to severe apnea with sleepiness must inform you of your obligations. For group 2 drivers (trucks, buses), the fitness-to-drive assessment is stricter and the occupational doctor is generally involved. If your apnea is diagnosed, talk to your doctor to clarify your situation. Consult a sleep physician for an individual diagnosis.
For professional drivers (group 2), yes: effective CPAP therapy is required to maintain fitness to drive. Inadequate compliance or uncontrolled residual AHI may lead to a temporary unfitness declaration. For private drivers (group 1), there is no automatic suspension, but the doctor may declare you temporarily unfit if sleepiness persists. The simple rule: use your CPAP consistently and keep your compliance reports.
Group 1 covers drivers of private vehicles, motorcycles and mopeds (licence B, A, AM). Group 2 covers professional drivers: trucks over 3.5 tonnes (C, CE), coaches and buses (D, DE). Medical fitness standards are much stricter for group 2, with mandatory periodic medical reviews and a formal requirement for effective CPAP therapy in cases of moderate to severe apnea.
The compliance threshold most often used for group 2 drivers is 4 hours per night on average, with a controlled residual AHI. This threshold matches the INAMI convention. Beyond the number, what matters is real-world treatment effectiveness: resolution of daytime sleepiness and a well-controlled residual AHI. For group 1, there is no official numeric threshold, but adequate compliance is recommended for your own safety.
Not directly. The FPS Mobility does not access your CPAP data remotely. Your approved doctor (or the CARA for professional drivers) assesses your fitness to drive at medical reviews. For group 2 drivers, these reviews are periodic and may require compliance reports (myAir data, OSCAR exports, or sleep centre reports). Always keep your CPAP history available.
An AHI of 30 corresponds to severe apnea. As a professional driver (group 2), you will most often be declared temporarily unfit until effective CPAP therapy is proven. The pathway: start CPAP quickly, demonstrate good compliance (minimum 4h/night, ideally more) and a controlled residual AHI, then request reassessment. Many drivers resume their activity within a few weeks of properly followed treatment. Consult a sleep physician to map out the steps.
Treated sleep apnea is not a valid reason to refuse car insurance in Belgium. However, if you have an accident linked to undeclared and untreated sleepiness, the insurer may invoke a failure to declare a medical condition and reduce or deny coverage. The simple rule: follow your treatment, keep your compliance evidence, and never drive sleepy. For more: complete sleep apnea guide.