Remember Sarkozy's plan for "Le Grand Paris?" If you don't, it's not your fault: it was one of those here today, gone tomorrow Sarkoplans. There was a big urban transport project embedded in all the airy imaginings of a new urbanplex stretching from Paris to the sea, however, and that hasn't died--yet. Cécile Duflot seems to have become its champion, after having been its enemy. But the budget crunch may do for the rail line as well.