How would one describe carriage garage doors?

Answer 1

Well, carriage doors actually look like the very first garage doors used. Like many barn doors back at the time, these are two large doors, sliding outwards. Nowadays, most carriage doors look rather prestigious and expensive, unlike their barn-like origin. You can get a wonderful idea by looking at Google Images.

Answer 2

One can describe carriage garage doors as doors, which are used in garage and either sliding to the sides to open or raising themselves. They are often look royal and expensive.