Diabetes is one of the most common medical conditions in Australia, and most people with diabetes drive without any issues. But there are situations where diabetes can affect your ability to drive safely, and there are rules you need to be aware of.
This article explains how diabetes and driving are managed in NSW, when you need to tell Transport for NSW, and when an OT driving assessment might come into the picture.
Does diabetes affect driving?
For many people, it doesn't. If your diabetes is well-managed (whether type 1 or type 2), your blood sugar levels are stable, and you're not experiencing complications, driving is generally fine.
The main driving-related risk with diabetes is hypoglycaemia (a "hypo"), where your blood sugar drops too low. A hypo can cause confusion, drowsiness, poor coordination, blurred vision, and in severe cases, loss of consciousness. All of these are dangerous behind the wheel.
Hypoglycaemia is primarily a risk for people who take insulin or certain oral medications that can lower blood sugar. If you manage your diabetes through diet alone, or with medications that don't typically cause hypos, the driving risk is much lower.
Beyond hypoglycaemia, diabetes can also affect driving through its longer-term complications:
Peripheral neuropathy. Reduced sensation in the feet can affect your ability to feel the pedals and control braking pressure.
Vision changes. Diabetic retinopathy, macular oedema, or cataracts can affect the vision needed for safe driving.
Cardiovascular effects. Diabetes increases the risk of cardiac events, which can affect driving.
Cognitive effects. Poorly controlled diabetes (particularly with frequent severe hypos or very high blood sugar over long periods) can affect cognitive function.
Do I need to report diabetes to Transport for NSW?
It depends on how your diabetes is managed.
If you manage your diabetes with diet alone or with medications that don't cause hypoglycaemia, you generally don't need to report it to Transport for NSW, unless you have complications that affect your driving (such as significant vision changes or peripheral neuropathy).
If you take insulin or medications that can cause hypoglycaemia, you are required to report your diabetes to Transport for NSW. This is because of the risk of a hypo while driving.
Your GP or endocrinologist will usually handle this by completing the Transport for NSW Fitness to Drive form. They'll assess your hypo risk, your blood sugar control, and your hypo awareness (whether you can reliably feel when your blood sugar is dropping).
The Austroads Guidelines on diabetes and driving
The Austroads Guidelines (the national medical standards for driving) set out specific requirements for drivers with diabetes. The key factors they consider include:
Hypoglycaemia awareness. Can you reliably recognise the early signs of a hypo? If you have impaired hypo awareness (meaning your blood sugar can drop low without you noticing), this is a significant concern for driving safety.
Frequency of severe hypoglycaemia. A severe hypo is one where you needed someone else to help you, or where you lost consciousness. Frequent severe hypos may affect your eligibility to drive.
Blood sugar monitoring. Whether you monitor your blood sugar regularly, and whether you check it before driving.
Overall diabetes management. Your HbA1c levels, your medication regime, and how stable your blood sugar has been.
Complications. Whether you have any of the complications mentioned above (neuropathy, retinopathy, cardiovascular issues) that may independently affect driving.
Your doctor assesses these factors and makes a recommendation to Transport for NSW about your fitness to drive.
Licence conditions for drivers with diabetes
Many drivers with diabetes on insulin have conditions placed on their licence. Common conditions include:
Regular medical review. You may need to have your fitness to drive reassessed at specified intervals (for example, annually or every two years), depending on your situation.
Must carry blood glucose monitoring equipment. Some drivers are required to carry their glucose meter and hypo treatment (fast-acting carbohydrates) in the vehicle.
These conditions are managed through your GP or endocrinologist and the Transport for NSW Fitness to Drive process. They don't usually involve an OT driving assessment.
When an OT driving assessment is needed
Most diabetes-related driving decisions are handled between you and your doctor. An OT driving assessment is not the standard pathway for diabetes.
However, an OT assessment may be relevant when diabetes has caused complications that affect your functional ability to drive:
Peripheral neuropathy affecting your feet. If you have significant loss of sensation in your feet, your doctor may refer you for an OT assessment to evaluate whether you can safely feel and operate the pedals. In some cases, vehicle modifications (such as hand controls) may be recommended.
Vision changes. If diabetic eye disease has caused lasting vision changes that may affect driving, an OT assessment can evaluate the practical impact on your on-road performance, alongside an assessment from your ophthalmologist.
Cognitive effects. If repeated severe hypoglycaemia or prolonged poorly controlled diabetes has affected your cognitive function, an OT assessment may be appropriate to evaluate the impact on driving.
Multiple complications. If you have several diabetes-related complications that together may affect driving (for example, mild neuropathy plus some vision changes plus cardiovascular issues), an OT assessment can evaluate the combined impact.
In most of these situations, the referral comes from your GP, endocrinologist, or rehabilitation specialist.
Practical tips for driving safely with diabetes
Check your blood sugar before driving. If you take insulin or medications that can cause hypos, check your blood sugar before you get behind the wheel. Don't drive if your levels are low.
Carry hypo treatment in the car. Keep fast-acting carbohydrates (glucose tablets, juice, jelly beans) within reach in the vehicle at all times. Don't put them in the boot.
Pull over if you feel symptoms. If you notice any signs of a hypo while driving (shaking, sweating, confusion, dizziness), pull over safely, turn off the engine, and treat the hypo. Don't try to drive through it.
Don't resume driving until you've recovered. After treating a hypo, wait until your blood sugar has returned to a safe level and you feel fully recovered before driving again. This usually takes at least 30 to 45 minutes.
Plan for longer trips. On longer drives, take regular breaks and check your blood sugar. Have snacks available.
Be honest with your doctor. If you're having more frequent hypos, or if your hypo awareness has changed, tell your doctor. They need this information to assess your fitness to drive accurately.
Getting help
If your doctor has concerns about how diabetes-related complications are affecting your driving, they can refer you for an OT driving assessment. You can start the process at steerdriving.com.au/referral.
For most diabetes and driving questions, your GP or endocrinologist is the right person to speak to first.
Ready to book an OT driving assessment in Sydney? Steer Driving is a mobile assessment service covering greater Sydney. Whether you already have a referral or you're just getting started, get in touch and we'll guide you through the next steps.
This article was written by Elise, an AHPRA-registered Occupational Therapist and Transport for NSW-registered driver assessor. Elise is the founder of Steer Driving, a mobile OT driving assessment practice in Sydney.
FAQ Section
Can you drive with diabetes in NSW? Yes, most people with diabetes drive safely. However, if you take insulin or medications that can cause hypoglycaemia, you are required to report your diabetes to Transport for NSW and may have conditions placed on your licence.
Do I need to report diabetes to Transport for NSW? If you take insulin or medications that can cause hypoglycaemia, yes. If you manage your diabetes with diet alone or medications that don't cause hypos, you generally don't need to report unless you have complications affecting driving.
Can a hypo affect my driving? Yes. Hypoglycaemia can cause confusion, drowsiness, poor coordination, blurred vision, and loss of consciousness, all of which are dangerous while driving. Always check your blood sugar before driving if you're at risk of hypos.
Do I need an OT driving assessment for diabetes? Usually not. Most diabetes-related driving decisions are managed by your GP or endocrinologist. An OT assessment may be needed if diabetes has caused complications affecting your functional ability to drive, such as significant peripheral neuropathy, vision changes, or cognitive effects.
What should I carry in the car if I have diabetes? Your blood glucose monitoring equipment and fast-acting carbohydrates (glucose tablets, juice, or similar) should always be within reach in the vehicle, not in the boot.
Can diabetes affect my commercial vehicle licence? Yes, the requirements are stricter for commercial licences (trucks, buses). If you take insulin, there are additional restrictions. Your doctor and Transport for NSW can advise on the specific rules for your licence class.