Please help identify 80s horror film

Killer places a scorpion, spider, or snake in a motorcyclist’s helmet resulting in death. I recall the film taking place in a desert/rural location. Movie was rented during the VHS/Blockbuster Video era in the late 80s or early 90s. Plot may involve students or possibly a film crew near a highway being menaced. Also may include “highway” or “freeway” in the title. Been trying to figure this one out for over 20 years.

Freeway Maniac?

That must be it. The description/title is so close to my memory, however the only thing I remember is the scorpion scene and some empty roadside desert landscapes. Gonna watch it now to confirm. My sincere thanks for the help!