This truck pulled out from a side street just before we got there and, since it was rush hour, we slowly followed it for ten minutes before it finally turned off.
Since spring hadn't yet arrived here, we didn't have the top down,
but I hadn't thought to switch the air intake to internal circulation, so soon we were able to appreciate its delicate fragrance.
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It was air freshener!
This is a little different from what I recall from similar vehicles during my younger days in rural upstate New York!