These prepositions are tricky business as there are no set of formulas to explain the usage. My wife explained about these two prepositions so I thank her for that. I never knew this before.
I used to work for a truck/lorry sales company, the difference between the US and the rest of the world version is the bonnet (The nose of the truck). One thing that is also different is the steering wheel one is on the left and the other is on the right. That makes it also driving on the different side of the road.
I decided to follow up the English vs english post to add more spice to this blog besides idioms.