I was driving down from Quesnel to Harrison Hotsprings last Tuesday for a little vacation with my wife and kid. At around 4:30 pm, we were travelling just about 1km east from the Ruby Creek bridge on Highway 7. We noticed a strong odor. At first, we thought someone let one go in the car, but about 10 seconds later, the smell turned into more of a sulphur smell. It was totally gone by the time we acrossed the Ruby Creek bridge. There was no car, no trains, and no one on the road at that time. No, we didn't stop. Just an interesting observation.