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Access map to Challenger
A. From Porte d'Auteuil:
Take the A13 and follow signs for Versailles/St-Quentin-en-Yvelines/Rouen.
After 10 km, at the Rocquencourt triangle, take right exit to the
A12, following signs for St-Quentin-en-Yvelines/Dreux/Rambouillet/Bois
d'Arcy/Versailles Satory. After 6 km, stay in the right-hand lane
and follow the A12b Toutes Directions/Evry/Lyon/Dreux/St-Quentin/Bois
d'Arcy/Versailles.
1.8 km further on, take the exit for Evry/Lyon/Versailles Satory,
follow the N286 on the left (important: don't follow signs for St-Quentin/Trappes/Rambouillet).
After 800 m, take the exit Guyancourt/Voisins-Le-Bretonneux, keep
to the right, then see C. below.
B. From pont de Sèvres:
Take the N118 towards Chartres/Nantes/Orléans/Bordeaux/Meudon. After
6 km, follow signs to Versailles/Créteil/Clamart/Vélizy Centre (A86),
then turn off right, direction Versailles/Vélizy Centre. After 4 km,
continue on the N286 (the A86 becomes the N286) towards Rouen/St-Quentin/Dreux/Versailles
for 6 km.
Go past the Epi d'Or (sculpture) and take the exit on the right to
St-Quentin/Guyancourt/Montigny/Voisins-Le-Bretonneux. Keep to the
right, then see C. below.
C.
Follow the D127 towards St-Quentin/Guyancourt (Les Sangliers - Les
Saules - Les Chênes)/Centre Commercial Régional. Go 3/4 of the way
round the Sangliers roundabout and turn into Avenue Eugène Freyssinet
(Sangliers district). Drive to the reception building.
Pedestrian access:
Take the RER C on the south bank of the Seine, or the regional train
from Paris Montparnasse station.
Get off at St-Quentin-en-Yvelines station, then take the 468 bus (Cercle
Intérieur) to the Challenger bus stop.
 See
the map
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