traffic regulation, control of the movement of vehicles and pedestrians, chiefly on city streets. Formal regulation of motor vehicle traffic was instituted in New York City in 1903; a set of Rules for Driving was issued by the police commissioner, and a traffic squad was formed. Similar systems were soon adopted in cities all over the world. Since that time, as the volume of traffic has increased, a variety of control mechanisms have been developed to regulate the safe flow of traffic.
"traffic regulation." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (September 25, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/traffic-regulation
"traffic regulation." The Columbia Encyclopedia, 6th ed.. . Retrieved September 25, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/traffic-regulation