My contribution to Monochromia.
Several years ago the Ira Bong bridge was closed, one direction at a time, for improvements. Since this bridge happens to have a bike/pedestrian path that allows riders to cross between Duluth and Superior, I was able to go out a couple of times and have half the bridge to myself. This gave me a rare opportunity to capture images that otherwise would be impossible to get, at least legally. I made two trips during that time, one daytime and one nighttime. Of all of the images, this remains one of my favorites.
Canon EOS 7D, ISO 800, f/18, 8 sec,
Post: Adobe Lightroom, Photoshop and Silver Efex Pro 2
More of my images can be found at my personal blog.