Urban landscapes: following the light trails

OLD CITY HALL AND MACLEOD TRAIL TRAFFIC, CALGARY, ALBERTA
I knew this building was lit at night, so it was a matter of positioning myself to capture all the morning rush-hour traffic as it moved past.
It took several tries before I realized I should get as high as possible to capture the three lanes of traffic. This is a 15-second exposure, made just before 7 a.m. (check the clock on the building).
Nikon D7100, tripod
Click on the picture for a larger view.
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