Anybody driving down the A13 which becomes the A12 and passing through above mentioned place towards Trappes, be aware that the road onto the N10 heading down to Rambouillet is closed.
I passed through about 01:00 this morning and it was a nightmare to sort it out how to get round the closure, sat nav kept taking me to the closure and I did not have a clue where to go. About for 30 minutes it was like "Magic Roundabout". I never even saw any "detour" signs to follow apart for the one at the road closure sign.
Eventually I got on the N12 to Dreux by a bit of luck and turned off eventually to Elancourt and onto the N10 after Trappes and to Coignieres where I'm staying.