Lgv No Tresspassing Sign Collectable

Have i run into a glitch as i have one missing no trespassing sign and ive found the one at lambesc and ive follwed the steam guide and apparently i am still missing one

 

Bonjour, après Lambec, en descendant vers Marseille, il y a un panneau en pleine campagne, à 4 ou 5 kilomètres, pas facile à trouver.

 

Can i have that in english please

 

Hello, after Lambec, going down to Marseille, there is a sign in the countryside, 4 or 5 kilometers away, not easy to find.

 

I will have to go through every sign again and its not easy to do being a long high speed line