Changes

The perfect spot is at the motorway border crossing. There are toilets, money exchange, really slow traffic, and friendly environment. You can get very close to it by taking Geneve public transport buses. Lines 4(red) and D(light pink)stop closest to it. 42 also brings you close. Lines 4 and D leave from Bel Air (very central). You have to get out at Perly Village (note: in 2012 the stop is not called Perly-Village any more, but Ravières). Do NOT go until Perly Douane! From the Perly Village bus stop you cross the road, walk back 10 meters and turn right. (The left of the bus you just got off from.) You walk straight on the little street until you get to the bridge above the motorway. There is a short wire fence but people already bent the top of it, it is easy to hop over. After descending to the motorway, you turn right, and walk until the border. There is a concrete pavement outside the hard shoulder, you can walk safely to the spot. There is lot of traffic, straight ride to Paris possible!

The walking takes 20 min more or less. It is useful to ask for a big public transport map, in hostels for example. - the one with the streets shows you where to walk.