I love traffic trails, there is something quite spooky about them.
The top photo was done on a roundabout (or island as we call then in these parts!) i think that was a bus passing as the trail is quite high. See the winged horse in the middle of the roundabout, he looks cool with his sparkly wings, don't know what it's supposed to represent though.
The second photos is motorway traffic, i was stood on the bridge to take this i hasten to add!
Must go out and do some more of these soon.