In this instance, she needs to stay in the right lane to get off the interstate. Looks to me like in heavy traffic the exit manuever takes some precesion. There is not much distance between the on ramp and her exit ramp. My solution would be find an alternative route if she can't handle it.
It’s been some years since I left Wheeling (’75) but I know exactly where she’s talking about. That on ramp from Washington Ave is virtually the same as the off ramp which puts you on National Road. I used to run that route. As in “run” in sneakers when I was in my early 20s.