Why do truck drivers in movies honk their horns by pulling on a rope above their heads? Do trucks not have the button to activate the horn inside the steering wheel like normal cars?

Question

Why do truck drivers in movies honk their horns by pulling on a rope above their heads? Do trucks not have the button to activate the horn inside the steering wheel like normal cars?

In: 2818

Answer 1

I see you never sat by the side of the road and did the arm motion to get passing trunks to blow their horn.

Edit: “I’m” to “I”