Automated Vehicles Are Probably Legal in the United States
Bryant Walker Smith
University of South Carolina - School of Law; Stanford Law School Center for Internet and Society
1 Tex. A&M L. Rev. 411 (2014)
This article (an updated version of the original 2012 working paper) provides the most comprehensive discussion to date of whether so-called automated, autonomous, self-driving, or driverless vehicles can be lawfully sold and used on public roads in the United States. The short answer is that the computer direction of a motor vehicle’s steering, braking, and accelerating without real-time human input is probably legal. The long answer, contained in the article, provides a foundation for tailoring regulations and understanding liability issues related to these vehicles.
The article's largely descriptive analysis, which begins with the principle that everything is permitted unless prohibited, covers three key legal regimes: the 1949 Geneva Convention on Road Traffic, regulations enacted by the National Highway Traffic Safety Administration (NHTSA), and the vehicle codes of all fifty US states.
The Geneva Convention, to which the United States is a party, probably does not prohibit automated driving. The treaty promotes road safety by establishing uniform rules, one of which requires every vehicle or combination thereof to have a driver who is "at all times ... able to control" it. However, this requirement is likely satisfied if a human is able to intervene in the automated vehicle’s operation.
NHTSA’s regulations, which include the Federal Motor Vehicle Safety Standards (FMVSSs) to which new vehicles must be certified, do not generally prohibit or uniquely burden automated vehicles, with the possible exception of one rule regarding emergency flashers.
State vehicle codes probably do not prohibit — but may complicate — automated driving. These codes assume the presence of licensed human drivers who are able to exercise human judgment, and particular rules may functionally require that presence. New York somewhat uniquely directs a driver to keep one hand on the wheel at all times. In addition, far more common rules mandating reasonable, prudent, practicable, and safe driving have uncertain application to automated vehicles and their users. Following distance requirements may also restrict the lawful operation of tightly spaced vehicle platoons. Many of these issues arise even in the several states that expressly regulate automated vehicles.
The primary purpose of this article is to assess the current legal status of automated vehicles. However, the paper includes draft language for US states that wish to clarify this status. It also recommends five near-term measures that may help increase legal certainty without producing premature regulation. First, regulators and standards organizations should develop common vocabularies and definitions that are useful in the legal, technical, and public realms. Second, the United States should closely monitor efforts to amend or interpret the 1969 Vienna Convention, which contains language similar to the Geneva Convention but does not bind the United States. Third, NHTSA should indicate the likely scope and schedule of potential regulatory action. Fourth, US states should analyze how their vehicle codes would or should apply to automated vehicles, including those that have an identifiable human operator and those that do not. Finally, additional research on laws applicable to trucks, buses, taxis, low-speed vehicles, and other specialty vehicles may be useful. This is in addition to ongoing research into the other legal aspects of vehicle automation.
Number of Pages in PDF File: 112
Keywords: automated vehicles, autonomous vehicles, self-driving, driverless, vehicle automation, ITS, vehicle codes, rules of the road, Geneva Convention on Road Traffic, Vienna Convention on Road Traffic, NHTSA, FMVSS, Medellin, Medellin v. Texas
Date posted: August 1, 2013 ; Last revised: June 26, 2014
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