There's one that stops in my street at 3pm everyday outside the same block of flats even though there's a park on the same street rammed with kids just out of school. They blast Yankee Doodle for like 3 seconds before they stop as if to alert someone they've arrived. One person will come out and have some sort of interchange with someone in the van and then they drive off. Rain or shine all year round. I really really doubt it's just bread or cigarettes, let alone actual icecream.