Another Option:
Go with Take the RER Line A (Red) in direction Boissy St Legere untilthe station Nogent Sur Marne (~ 2€). There , leave the station in directionRue "Joinville" and follow the sign to the A4. Its about 30 minutes by feetfoot.I ve got a "A 4" sign because there is as well the acess to another Highway.I If someone stops ask if they can pick take you at least to the next gas station, thereanyone could go without paying anything is no toll (peajepéage)to get there so its a big chance to it's likely you will get at least to there.
===A6 South, to [[Lyon]], [[Marseille]], [[Barcelona]], [[Italy]]===