I remember watching a classic porn movie decades ago but I can't remember the name of it nor have I been able to find any of the scenes. Please help.

A brief synopsis of the scenes:

-Lates 70s/ early 80s film

-Entire film is focused around a diner/truck stop

-I believe the first scene is a cop getting a blowjob in his vehicle on the side of the road

-Another scene involves a van pulling into a full service gas pump. The attendant pumps gas while spying on a couple having sex inside the van.

-One of the waitresses catches her boyfriend having sex in the parking lot

-The same waitress, out of revenge, bangs a trucker in the back of his semi. I remember there being chicken coups in the back of the semi.

-another waitress has a glory hole scene in the diner.

-a waitress has sex in the kitchen in the back of the diner.

Thats all i can remember. Thank you in advance.

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