Driving in France-Difference #2-Route designations always start with a letter

The route that you are on appears at the top of the sign in a small orange rectangle. Abbreviations are:

• A – Autoroute – the limited access toll road.
• N – National routes – the old main routes, often multiple lane or divided highways.
• D – Departmental routes – major roads within a department (similar to a state).

These can be duplicated from department to department. Thus there are many roads named D2 throughout France (but only one N100).