Just had the fleeting thought that maybe there is a substantial cost to review and create enormous traffic safety research systems and the subsequent training required of law enforcement personnel and administrative staff.
In contrast to the status quo which is basically a long running experiment, I’m imagining the control condition is cars are electronically speed limited to 15 mph since there is substantial evidence that travelling at this speed reduces traffic fatalities to nearly zero.

Has anyone seen estimates of the administrative costs associated with traffic safety analysis? My first intuition is that it is trivial compared to the damage to life, limb, and property.