I don't know if this has ever been discussed before, but has anyone ever looked closely at the opening visuals used for seasons 2-5?

The first shot is of the train tracks, and if you look carefully to the right there's a highway. The cars appear to be driving on the left side of the road, meaning that (for some reason) this bit of footage must have been reversed.

Maybe the producers thought the opening shots looked better that way?

Just curious if anyone else has noticed this.