Line Dance, photo by Harold Davis. View this image larger.

From Sutro Heights Park in San Francisco, there’s a straight vista down Ocean Beach and the so-called Great Highway to the south past Golden Gate Park.

As dusk turned to night I stopped down my lens to create as long an exposure as possible. I love the effects that car lights make when it gets dark. Car lights in long exposures are almost as exciting and interesting as star trails

Here are some other images that use car lights in motion over time: Tioga Pass Road at Night, North Berkeley at Night, Ghosts of Mare Island, On My Way to Visit Katie Rose, Darkness Revealed, Golden Gate at Night, S-Curve, Cars.

[Nikon D300, 18-200 VR Zoom lens at 200mm (300mm in 35mm terms), 30 seconds at f/29 and ISO 100, tripod mounted.]