DEAR ABBY: I am an active, retired man who has a serious problem with my slightly younger sister. She’s a loud and aggressive back-seat driver. When she rides in my car, she feels compelled to loudly tell me what lane to drive in and to freak out over how close I am to the car in front and a variety of other issues she imagines.

I am a competent and safe driver, but her loud exclamations are not only annoying, they distract me at times, which I’m afraid could lead to an accident. “Get in the left lane!” she shouts, but she doesn’t see the cars behind us that I see in my mirror.

She knows how much this bothers me but seems not to care. I have lost my temper at her for doing it. Any advice on how to get her to refrain from these outbursts while I’m driving? — ANGRY BIG BROTHER

DEAR BROTHER: Your sister may not be able to control herself, which is why she does this. Because you find the back-seat driving not only annoying but potentially dangerous, stop letting her ride with you and your problem will be solved.

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Dear Abby is written by Abigail Van Buren, also known as Jeanne Phillips, and was founded by her mother, Pauline Phillips. Contact Dear Abby at www.DearAbby.com or P.O. Box 69440, Los Angeles, CA 90069.