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).