Summary of State Speed Laws - NHTSA

JURISDICTION: WYOMING
General Reference: Wyoming Statutes Annotated
Basis for a Speed Law Violation:
Basic Speed Rule: No person shall drive a vehicle at a speed greater than is
reasonable and prudent under the conditions and having
regard to the actual and potential hazards then existing. §31-
5-301(a)
Statutory Speed Limit: 75 mph on interstate highways §31-5-301(b)(iii)
65 mph on other highways §31-5-301(b)(iv)
30 mph in an urban district §31-5-301(b)(ii)
20 mph in a school zone or crossing §31-5-301(b)(i)
Posted (Maximum) Speed Limit: I. Based on engineering and traffic investigations, the State
may increase or decrease the above speed limits on the State
highway system. 536 §§31-5-301(c) and 31-5-302. The State
highway system includes city streets that are designated as
State highways. §24-1-127
II. Based on engineering and traffic investigations, local
governments may increase or decrease the above speed limits
on the highways or streets under their jurisdictions. 537 §§31-5-
301(c) and 31-5-303(b)
III. Based on investigations, the State or a local government
may establish safe maximum speed limits for any bridges or
elevated structures under their respective jurisdictions. §31-5-
305(a) and (b)
Minimum Speed Limit: I. No person shall drive a motor vehicle at such a slow speed
as to impede the normal and reasonable movement of traffic.
§31-5-304(a)
II. A person driving at less than the normal speed of traffic
shall drive in the right-hand lane then available for traffic or as
close as practicable to the right-hand curb or edge of the
roadway. §31-5-201(b)
Posted (Minimum) Speed Limit: Based on engineering and traffic investigations, the State or a
local government may establish minimum speed limits on the
highways or streets under their respective jurisdictions. §31-
5-304(b)
Other: N/A
536 The State may also establish different highway speed limits (1) for different types of vehicles (e.g., persons who operate
certain types of trucks may be required to drive these vehicles at a slower speed than those who operate other types of
motor vehicles), (2) at different times of the day, (3) for various weather conditions or (4) for other factors bearing on safe
speeds. §31-5-302
537 However, a local government cannot increase a speed limit to >55 mph within an urban district and, except as noted, it
cannot decrease the speed limit to