To have a continuous effect, this would need some persistent e-inkpaper to redraw cars, obstacles or similar stuff on the road. Also, sorry to say it - but the

To have a continuous effect, this would need some persistent e-inkpaper to redraw cars, obstacles or similar stuff on the road. Also, sorry to say it - but the speed limit is set by the common lowest denominator- meaning, a old guys reflexes, in a fully loaded lorry with the worst possible breaks must stop at the smallest acceptable visible range at clear weather.