hmmm.. in Kansas, where I grew up, 'blacktop' was just another term for asphalt, and more often used as a verb when street reconstruction was to be done.

One common difference in usage on both sides of the pond..umm..ocean... is to name items by the most common commercial product name. We have 'Kleenex' and 'Jello'...and when I first worked in a grocery store, I was told to "use a 'Listo'" to mark something...that being the brand of ink marker the store carried.
I'll confess that I was totally confused the first time I saw the term 'Araldite' used in the context of adhesives. I had to do a search to discover it was good old epoxy.
Other instances abound.