Where Is It? Update

This is where it is:

http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=all%C3%A9e+des+cygnes,+Paris&sll=37.0625,-95.677068&sspn=49.089956,76.640625&ie=UTF8&hq=&hnear=%C3%8Ele+des+Cygnes&t=h&ll=48.851494,2.28389&spn=0.005019,0.009356&z=17

Just click on the link.

It's the Pont Rouelle in Paris, reserved for RER regional express trains and crossing over a narrow island (a strip really) called the Allée des Cygnes.