Dots and dashes

I've always fancied the idea of getting a long exposure shot of traffic, and today I got my opportunity!
I had dropped Iain off for a day's work experience with a company based on a trading estate near the motorway. I was planning to drive to my usual subway station, but they told me to leave my car and walk across the footbridge to a different station. I took a photo on my way across in daylight with my phone (see extra) but I was hoping to get a night shot on my way back. This was taken with my little camera resting on the handrail :)