She self-diagnosed that it was confidence issues.
She did several things, starting with taking a defensive driving for seniors course at the local community college. There was classroom and experiential learning that focused on how reaction times change, the effects of diminishing night visual acuity, and what adjustments should be made in braking patterns, attention to signs, turning radius, evaluation of road conditions, etc.
They also offered a discount on "older driver fitness exams" which included vision and hearing tests, reaction time for visual and auditory stimuli, reflexes, cardiac acceleration tracking, and general fitness.
And they provided resources: An updated road sign recognition guide, an 'emergency resources' card to carry in the glove box or door pocket, and a certificate of completion that some insurance companies will provide a discount for (not hers, though. She was pissed about that!)
Anyway, that seemed to help her quite a lot with what she called the "worry flashes" while driving.
helpfully,
Bright