motion

Blurred umbrellas on a city street. Amazing and effective use of a slow shutter speed! It's an awesome artistic way to convey busy city life.

In this image, the blur of people moving around in the crowd makes it look interesting, but it is also focusing on particular people who are standing, walking, moving in what looks like a busy area. A slow shutter speed is used in this image.

Moving train, sun shining onto a train station.all on a slow shutter speed. Beautiful (Passage of time idea)

Ferris Wheel - Tom McCall Waterfront Park, Portland, Oregon - By James Unkov

This motion blur image has used a slow shutter speed to track movement in the night time. By Abelardo Ojeda

Bangkok Traffic by mark burban (snapmole) © . now this one you got to love, fantastic colorful long exposure light trails .

Then it's just the car's movement and the cars outside that will create the blur and not camera shake. Obviously night time would work best to record light streaks.