Food trucks have evidently been around for a really long time...
Quote1691 – New Amsterdam (now known as New York City) begins regulating street vendors selling food from push carts.
https://mobile-cuisine.com/business/history-of-american-food-trucks/
I do remember at one short-lived job I had, the truck would come around for morning break (this was a job working at a lumber distributor) and the horn would blow at break time, lunch time, and end of shift; sorta like working with Fred Flintstone at the Slate Rock and Gravel Company. It was called the roach coach...sold coffee (plenty) along with anything else one could possibly want. And whaddya know...
Quote1960’s – Roach coaches make their presence known to construction sites around the country.
Some great pics here.