70:03:01:61.03Longer combination vehicle -- Power requirements and speed limitations.
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
Rulemaking activity
The power unit pulling the LCV must be of sufficient horsepower to maintain a minimum speed of 40 miles per hour when pulling fully loaded trailers. The LCV may not exceed a maximum speed of 65 miles per hour when operating on interstate highways or 55 miles per hour when operating on other highways. For the purposes of this section, enforcement tolerances are prohibited.
Source: 16 SDR 49, effective September 19, 1989; 22 SDR 166, effective June 2, 1996.