No. It's obviously a modification of the picture. The global picture does'nt have any black pixel. This image lacks contrast. There is not black pixel nowhere, even in the shadows. These black borders were traced after the snapshot.
I was about to disagree with dda too, but now I think he's right. Upping the gamma of the image still shows the black spots as pure black while all other shadow and dark sections are lightened. This suggests use of pure RGB black in the digital form of the imagery (before compression; there are minor artifacts visible in the black at gamma +7).
The only other explanation would be that the shadows left by the walls of the bridges and ramps are intensely darker than the shadows formed by trees and buildings and the bridges themselves (on roads below). I don't think so.
No Longer There 
The only other explanation would be that the shadows left by the walls of the bridges and ramps are intensely darker than the shadows formed by trees and buildings and the bridges themselves (on roads below). I don't think so.
Those black lines are still strange and unexplained... but now I know that I'm not alone anymore to think that. :)