Next week, my family & I will be headed to Stuttgart, Germany, and then onto Luxembourg, France, Belgium & finally Amsterdam, Netherlands. What I'm wondering is what are the differences in these countries in the highways & their nomenclature?
For example, what does each letter mean when I see it on signs, or if we're driving, what kind of road is the A6 in comparison to the E25, N121, R22, etc. (random numbers)? Any help would be appreciated.