We can only wish authorities would have to invest in fueling and maintaining drones, visible in the sky, to enforce speeding law. The signs could say: SPEED

We can only wish authorities would have to invest in fueling and maintaining drones, visible in the sky, to enforce speeding law. The signs could say: SPEED ENFORCED BY TRACKING YOUR MOBILE PHONE ...or even... SPEED ENFORCED BY REVIEWING LOGS OF GOOGLE MAPS INTERACTIONS Eventually navigation apps could offer both an "estimated travel time" and a "don't make the trip in less time than this, or we'll have to report you for a speeding citation".