Following on from the success of the new metro line 14 in Paris, it was decided to convert the very busy line 1 to automatic operation.
On 19 July 1900, the line was opened between Porte Maillot and Porte de Vincennes to connect the various sites of the World Fair.
Today, it is the most utilised subway line on the network with over 725,000 people per day on average.
In the West, the line terminates at the spectacular Grande Arche de la Défense.
This from the RATP web site:-
"Each platform screen consists of 18 door modules. Each night, teams install two modules, which will be operational when service resumes the next day.
During this period, it is important to be vigilant and not to lean over the tracks at stations where renovation work is in progress. It is also essential to observe the new rules to ensure that the platform edge doors system works as smoothly and efficiently as possible."
Some stations have been closed for longer periods to install doors, but automatic trains have been operating alongside "normal" rolling stock until all the new units have been delivered.
Trains on line 1 run about every 1 minute 50 seconds at peak times, carrying 220 million passengers annually, and there are 25 stations. By comparison, London's most intensively used line, the Victoria, carries 183 million passengers annually and has 16 stations; trains run every 2 minutes at peak times.
Boris, Christian Wolmar and Bob Crow should all have a chummy weekend away in Paris and see how a really busy underground network can be run; without drivers! See Boris Blunder or Brilliant Bonus  (read again). But, there is a snag. It is all a much much more expensive combination of local tax, national tax and fares than in London.
The cost of converting line 1 to automatic was projected as 100 million euros. That figure does NOT include the new trains which are costing about 480 million euros although the existing Line 1 stock will be redeployed elsewhere so complex accountancy applies. Full automatic and driverless operation is due at the end of 2012.
As is no often the case in modern transport policy, you pays your money and you makes your choice!