you might be able to get around it my using aa (subpixelling)

I'm surprised you can see the wiggle at normal size! It's product of the size of the car and trying to get it to move slowly. I may have to experiment with slow moving cars in this scale, it's tricky. I tried various colours for the lights on the emergency vehicle and thought these were the best. This is the first animation I've done lights like this and tried to get my standard size cars to go slow

nice piece, bit odd how the red vehicle wiggles down the street though. i also wonder how the police lights would look if the colors were much brighter and saturated.