Setting speed limits “for roads open to public travel” in the United States has always been the responsibility of state and local governments. Various engineering and traffic studies are conducted for a long time to set speed limits.  Every state has a basic speed statute that requires drivers to operate their vehicles at a speed that is reasonable and prudent for conditions. This basic rule is contained in the Uniform Vehicle Code (UVC) of that state. Maximum posted speed limits are usually set at a higher value for rural roads as compared to urban roads.  However, the government does not decide speed limits for “roads within private gated properties, except for gated toll roads, where access is restricted at all times, parking areas, driving aisles within parking areas and private grade crossings.”