Lights Flash by My Window

Last night I was a passenger in a car being driven down Melbourne's Westgate freeway. I had my trusty DSLR with me. The lights flashing by were intriguing, so I set the shutter to manual, turned off autofocus and pointed the camera out the window. I checked the first few images and made some adjustments to the shutter speed, finally settling on 1 second exposures. Most of the resulting images are not that great, but I got a few that I found interesting.