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UK Driving License Restriction Codes

Detailed guide for disabled drivers

This comprehensive guide explains each UK driving license restriction code in detail, including what modifications are required, who they apply to, and important safety considerations.

Important Information

These restriction codes are applied by DVLA medical advisers following assessment of your medical condition. They ensure you can drive safely while maintaining your independence. All codes are reviewed periodically, and some may be removed if your condition improves.

Vision and Hearing Restrictions

01

Eyesight correction

Must wear corrective lenses (glasses or contact lenses) when driving

Applies to: Drivers who cannot meet the minimum eyesight standard without correction
Requirements: Must be able to read a number plate from 20 metres with correction
Legal obligation: Driving without prescribed correction is illegal and invalidates insurance
02

Hearing aid

Must wear hearing aid when driving

Applies to: Drivers with significant hearing loss who require amplification
Safety note: Essential for hearing emergency vehicles, horns, and other traffic sounds
Maintenance: Ensure hearing aid is functioning and batteries are charged

Vehicle Control Modifications

10

Modified transmission

Limited to vehicles with modified transmission systems

Common modifications: Automatic transmission only, hand controls for gear selection
Suitable for: Drivers with limited leg mobility or coordination issues
Assessment: Requires driving assessment with occupational therapist
15

Modified clutch

Limited to vehicles with modified clutch systems

Modifications include: Left foot clutch, hand-operated clutch, or automatic transmission
Reason for restriction: Right leg weakness, amputation, or coordination problems
Cost consideration: Modifications can be expensive but may qualify for grants
20

Modified braking systems

Limited to vehicles with modified braking systems

Types of modification: Hand-operated brakes, left foot braking, or servo-assisted systems
Safety critical: Regular maintenance and testing essential for road safety
Training required: Specialist driving instruction needed to adapt to new system
25

Modified accelerator systems

Limited to vehicles with modified accelerator systems

Common adaptations: Left foot accelerator, hand controls, or pedal extensions
Installation: Must be fitted by approved specialist and regularly inspected
Adjustment period: Requires practice and professional training to ensure smooth operation

Advanced Vehicle Modifications

30

Combined braking and accelerator systems

Limited to vehicles with modified combined braking and accelerator systems

System type: Single control operating both acceleration and braking functions
Ideal for: Drivers with limited use of both legs or single limb operation
Complexity: Requires extensive training and regular competency assessments
35

Modified control layouts

Limited to vehicles with modified control layouts

Modifications include: Relocated switches, adapted indicators, modified dashboard controls
Customization: Tailored to individual reach and dexterity limitations
Assessment: Requires detailed occupational therapy evaluation
40

Modified steering

Limited to vehicles with modified steering systems

Adaptations: Spinner knobs, reduced effort steering, joystick controls
Power assistance: Enhanced power steering for reduced physical effort
Precision: Maintains full control while reducing strain on arms and shoulders

Comfort and Visibility Modifications

42

Modified rear view mirrors

Limited to vehicles with modified rear view mirrors

Enhancements: Wide-angle mirrors, additional mirrors, or panoramic systems
Compensation for: Limited neck movement, reduced peripheral vision, or blind spots
Positioning: Precisely adjusted to individual field of vision requirements
43

Modified driving seat

Limited to vehicles with modified driving seats

Adaptations: Swivel seats, height adjustment, lumbar support, or wheelchair transfer
Comfort features: Pressure relief, temperature control, or postural support systems
Safety integration: Maintains proper seatbelt positioning and airbag compatibility

Motorcycle and Specialist Vehicle Restrictions

44

Motorcycle modifications

Limited to motorcycles with specific modifications

Common adaptations: Hand controls for rear brake, modified gear levers, or prosthetic attachments
Balance considerations: Ensures rider can maintain control with physical limitations
Testing required: Special motorcycle test with adapted machine
45

Motorcycle with sidecar only

Limited to motorcycles with sidecars only

Stability benefit: Three-wheel stability for riders with balance or coordination issues
Handling difference: Requires different steering and cornering techniques
Legal requirement: Cannot legally ride solo motorcycles or trikes
46

Tricycles only

Limited to tricycles only

Vehicle type: Three-wheeled vehicles with car-like stability
Suitable for: Drivers who cannot balance on two wheels but can operate controls
Modern options: Includes modern three-wheelers like the Polaris Slingshot
47

Articulated vehicles only

Limited to articulated vehicles only

Vehicle definition: Trucks with separate tractor and trailer units
Restriction reason: May relate to specific medical conditions affecting rigid vehicle operation
Professional impact: Limits commercial driving opportunities to specific vehicle types

Getting Your License Assessed

If you have a medical condition that may affect your driving, you must inform DVLA. They will arrange for a medical assessment and, if necessary, a practical driving assessment. This process ensures you receive the appropriate restriction codes to drive safely and legally.

Many restrictions can be removed if your condition improves or if you adapt well to modifications. Regular reviews ensure your license reflects your current capabilities.

For official guidance and to report medical conditions, visitgov.uk/dvla or contact DVLA directly. Always consult with medical professionals and approved driving instructors when considering vehicle modifications.