Cache is NOT located at the posted coordinates.
This is my first puzzle cache. The solution to the riddle below will give you a single 8 letter word that ties in to the final location. You will need to use a trick or two (including DR where necessary) to transform letters into numbers. If you get stuck, check the hint. There's one to help solve the riddle, one to help with the coordinates and one for the cache itself.
Once you are at GZ, keep an eye out for muggles out and about! Also, no photos of the cache location please.
Cars and trains and bikes and feet. So many ways to get from a to b! No boats, but multiple other options in plain view. Find two ways that share a name, but not a mode. It's yours to discover!
N45 2C.(A-6)(D+4)(B-3), W75 4(H+3).EF(G-8)
Edit: I've tweaked the instructions and riddle a little since originally posting, added an extra hint and fixed an error in the coordinates formula (Ooops). Many thanks to Alpha772 for effectively beta testing this one for me.