Electric charge points are being installed in motorway service stations.
90 new electric vehicle charge points installed in Paris for the conference.
The charge points use a membership card scheme to allow access to the network.
For a fixed fee of about $350 a month, customers lease access to the batteries, swap stations and charge points.
For a fixed fee of about $350 a month, they will lease access to the batteries, swap stations and charge points.
Ari Kahn, policy adviser in the mayor's office for electric vehicles, said in an interview there were 64 public charge points in Manhattan, compared with 41 gas stations.
Looking further ahead, the vehicle would be able navigate itself to its owner when called from far away, even finding charge points en route if required.
NRG has agreed to finance the construction of 10,000 new charge points, including 200 fee-based public fast-charging stations, to operate under NRG's eVgo brand.
The supporting infrastructure is also expanding rapidly: Source London has 263 charge points now, but will have 1,300 points by 2013.
A larger range of models and a greater number of plug-in charge points helped push sales of such vehicles up 71% in June to 7,110.
If you want to drive to the south of France, the car will plot a route via the charge points you'll need to visit.
