For example, as someone with arthritic hands (among other body parts), I’m aided by power seats that can be preset two ways: one for my best driving position and the other to ease entry and exit from the car. Other useful features include power windows and mirrors, a thicker steering wheel that is easier to grip, keyless entry, an automatic tailgate closer and a push-button to start (and stop) the engine.

However, Mr. Nelson warned drivers of all ages about one feature now in most new cars: the backup camera. While great for older adults with flexibility issues and short people like me who can’t see objects directly behind the car, it won’t detect anything in the blind spot. That is, it cannot see people, vehicles or bicycles approaching the car from the side. The camera is meant to supplement, not replace, a driver’s visual checks. You must still check your mirrors, turn your head if possible and proceed with caution.

The AAA has created a very useful computerized site to help older drivers identify the makes and models of vehicles within various price ranges that may best suit their particular issues. At SeniorDriving.AAA.com/SmartFeatures, drivers can use drop-down menus to choose among categories like diminished vision, limited upper body range of motion, short stature or overweight, and decreased leg strength.

For those with various vision problems common among the elderly, for example, features like a high-contrast instrument panel with large number and letter displays, an auto-dimming rearview mirror and glare-reducing side mirrors can enhance driver safety.

Sometimes features that auto engineers consider helpful are annoying or distracting for some drivers. Several of the visual or audible warnings in my new car can be turned on or off by the driver.

Ms. Schold Davis urged people to “plan to spend time choosing a car and select the latest built-in safety features you can afford.” Noting that “not all safety features are alike car-to-car,” she said choosing the right car should be individualized according to each driver’s needs. The ultimate goal: “Decrease the likelihood of a crash and cushion against serious injury should a crash occur,” she said.

With the exception of dementia or certain conditions like serious visual impairment, “the diagnosis of a medical condition should not determine whether it’s safe for someone to drive,” Mr. Nelson said. “What does matter is how you manage your condition — whether, for example, you have diabetes and keep your blood sugar under control to prevent a blackout.” Manage your health issue properly, and chances are there is a car available that is safe for you to drive.