If you think this is a way to collect money, try driving in the Netherlands. Our normal speedlimit is 130 km/h, but we have limits of 100 km/h on wide and empty 5 lane highways in the middle of nowhere enforced by average-speedcameras (so 100% chance of getting caught even if speeding by as little as 2 mph)

Oh and the fine of 10 mph (16km/h) over the limit is 174 USD... but really, this is about safety, not about the money :X