A bigger problem I have than occasionally hearing "Keep straight on Highway 20" is "Keep straight on US-20, US-94, US-1, US-15, US-501, US-99, US-98, NC-24, NC-27, NC-17, PG-13, PS-5, N-64, I-95, I-85, I-40, Bragg Boulevard for 1.3 miles."

It puts the instruction at the beginning, and then it talks so long you forgot what it told you to do. It's how you stack overflow a human.