Numpty road naming question

[fatsteve]

Sorry guys, numpty alert..

Can anyone explain why some french roads have the 2 names (ie N138/E402).

Just confusing the fcuk out of me (granted, not difficult).

Flame-proof suit don'd

Ta

Steve

[Ballistic Banana]

N = National
E = European

BB see ya there and good luck in Rouen

BB

[fatsteve]

Ta BB,

See you there (providing I can find my way out of Rouen!!)

Steve