Symmetry is not too hard of a subject for me. I tend to notice geometry and symmetry pretty regularly in my day to day activities.
For this shot I had to wait a while to find the right combination of similar colored cars in good enough position to keep them symmetrical. I also had to deal with times where there were multiple cars.
I actually was hoping to get a pair of cars lined up both on this side and the other side of the bridge, but I wasn't able to stay more than a few minutes as I was on my lunch break at work.
While not perfectly symmetrical (the road signs and the direction/size of the vehicles are the exceptions) I thought that this was a good interpretation of the assignment.
On Taking Assignments
I frequently listen to the On Taking Pictures (OTP) podcast, which I highly recommend to anyone looking for good conversation about creativity, especially as it related to photography. In January 2014 the hosts, Bill Wadman and Jeffery Saddoris, began a new segment of weekly assignments that they gave to listeners. Results of the assignments are posted on the OTP Google Plus group. I decided that I would commit myself to the assignments for a year without interruption, and that I would complete each one before the next assignment was announced on the show each Tuesday morning. My 'On Taking Assignments' blog posts are the culmination of my year-long focus on these assignments.