Yes, people with one arm can legally drive in every U.S. state. There is no federal or state law that requires two hands to operate a personal vehicle. Thousands of people with upper limb loss or impairment drive daily, many using affordable adaptive equipment that lets them safely manage steering, signaling, and other controls with a single hand.
Licensing Requirements
Getting a driver’s license with one arm typically involves a medical review through your state’s Department of Motor Vehicles. Most states require a medical clearance form signed by a physician confirming you can safely operate a vehicle. Some states then require an on-road driving test, sometimes with a Certified Driver Rehabilitation Specialist (CDRS) present, to verify you can handle real-world conditions. If you pass, your license may carry a restriction code noting that specific adaptive equipment is required whenever you drive.
For commercial drivers, the process is more formal. The Federal Motor Carrier Safety Administration runs a Skill Performance Evaluation (SPE) Certificate Program that allows drivers with missing or impaired limbs to operate commercial trucks across state lines. Applicants must demonstrate the ability to safely complete both on-road and off-road driving tasks. If they pass, they receive an SPE certificate and can drive professionally.
Adaptive Equipment for One-Handed Driving
The most common and important modification is a spinner knob, sometimes called a steering ball, that attaches to the steering wheel. This small device lets you make full steering rotations, including sharp turns, with one hand. Without it, a single hand has to repeatedly reposition on the wheel during turns. Spinner knobs are inexpensive, typically under $50 for basic models, and can be installed in minutes. Some states restrict their use on certain commercial vehicles, but they are legal for passenger cars across the country.
The bigger challenge is managing secondary controls: turn signals, windshield wipers, headlights, and the gear shifter. These are normally on the opposite side of the steering wheel from your dominant hand, which means reaching for them requires letting go of the wheel. Several types of extension levers solve this problem:
- Crossover turn signal levers extend the signal stalk closer to the steering hand so you can activate blinkers without releasing the wheel.
- Drop-style turn signal levers let drivers using a left-hand control activate signals without removing their hand from the hand control.
- Column-mount multi-function levers attach to the steering column and provide access to all the functions built into the original signal stalk, including high beams and wipers, from a more convenient position.
These devices mount using bands or clips rather than screws, so they don’t permanently alter the vehicle. A full set of adaptive modifications for one-handed driving rarely costs more than a few hundred dollars for a standard car with automatic transmission.
Prosthetic Arms and Driving
Some drivers with upper limb loss use a prosthetic arm to assist with steering rather than relying solely on adaptive equipment. A body-powered prosthetic with a hook or terminal device can grip a steering wheel effectively, giving the driver a two-point contact for routine driving while the sound arm handles signals and other controls.
Myoelectric prosthetics, which respond to muscle signals, can also be used but offer less tactile feedback. The FMCSA recognizes both prosthetic devices and vehicle modifications as valid approaches for safe driving, and the choice often comes down to personal comfort, the level of limb loss, and how well the prosthetic fits. A CDRS can help evaluate which approach works best for your specific situation, testing both options during a clinical and behind-the-wheel assessment.
How Steering Works With One Hand
Standard two-handed driving instruction teaches hand-over-hand steering (crossing one arm over the other during turns) and push-pull steering (sliding hands alternately up and down the wheel). Neither technique works as taught with a single hand. Instead, one-armed drivers use the spinner knob as a fixed grip point and rotate the wheel continuously without needing to reposition. This actually provides smoother steering input during sharp turns than the hand-over-hand method, since there’s no momentary gap while switching hand positions.
For gentle lane changes and highway curves, a single hand at the 12 o’clock position with a spinner knob gives more than enough control. For emergency maneuvers, the knob lets you spin the wheel rapidly in either direction. Drivers who train with a CDRS practice these scenarios repeatedly, including sudden swerves and hard braking, before being cleared to drive independently.
Everyday Challenges Beyond Driving
The driving itself is often the straightforward part. Day-to-day tasks around the vehicle can be trickier. Pumping gas, for instance, requires holding a nozzle, squeezing a trigger, and sometimes wrestling with a fuel cap simultaneously. Under the Americans with Disabilities Act, gas stations are required to provide refueling assistance to customers with disabilities at the self-service price. Stations must post signs or provide a call button so you can request help. The only exception is when a station is operating on remote control with a single employee, though even then, assistance is encouraged.
Other tasks like loading groceries, scraping ice off a windshield, or changing a tire in an emergency require creative problem-solving or occasional help. But none of these are barriers to legally driving or being fully independent on the road. Many one-armed drivers report that the vehicle modifications become second nature within a few weeks of practice, and driving feels no different from any other daily routine.
Getting Started
If you’ve recently lost the use of an arm, or you’re a parent wondering about a child’s future driving ability, the first step is an evaluation with a Certified Driver Rehabilitation Specialist. These professionals assess your physical capabilities, recommend the right combination of adaptive equipment, train you on the modifications, and provide documentation your state’s DMV will accept. Many vocational rehabilitation programs cover the cost of the evaluation and equipment. Your state’s vocational rehabilitation office can connect you with a local CDRS and may fund the entire process, including vehicle modifications.