Technology is a self-perpetuating phenomenon. Take WWII. In 1941 the Yanks were making a bare minimum of bombers for the air force, but four years later, through improved design and manufacturing efficiencies, as well as the obvious demand-driver, American factories were pumping out B17s as fast as breweries, wineries and distilleries pump out liquid idiocy.
The same applies to road safety cameras.
Speed cameras and red light cameras, in their infancy, cost plenty to test, manufacture, buy, install and operate. While not exactly a novelty, they were on the way in. With continued improvements and efficient manufacture and installation, not forgetting the frantic demand of a ravenous government, the unit cost has reduced. The upshot: exponentially more cameras.
My challenge to you is this: nominate the year in which every single set of lights at every single intersection and pedestrian crossing are equipped with speed cameras and red light cameras.
My tip: 2018.