Street racing is a form of unsanctioned and illegal

Law

Law is a system of rules and guidelines which are enforced through social institutions to govern behavior, wherever possible. It shapes politics, economics and society in numerous ways and serves as a social mediator of relations between people. Contract law regulates everything from buying a bus...

 motor racing which takes place on public roads. Street racing can either be spontaneous or well-planned and coordinated. Well coordinated races are planned in advance and often have people communicating via 2-way radio/citizens' band radio

Citizens' band radio

Citizens' Band radio is, in many countries, a system of short-distance radio communications between individuals on a selection of 40 channels within the 27-MHz band. Citizens' Band is distinct from the FRS, GMRS, MURS and amateur radio...

 and using police scanners and GPS units to mark locations of local police hot spots. Street racing is reported to have originated prior to the 1930s due to alcohol prohibition

Prohibition

Prohibition of alcohol, often referred to simply as prohibition, is the practice of prohibiting the manufacture, transportation, import, export, sale, and consumption of alcohol and alcoholic beverages. The term can also apply to the periods in the histories of the countries during which the...

 in some parts of the United States.