<P> While all 2 lane roads maintained by WisDOT as of 2015 have a 55 mph maximum, a small portion of Minnesota State Highway 23 that passes through the state south of Superior but is maintained by MNDOT has a 60 mph limit through the state . </P> <P> Along with the aforementioned default speed limits, there are other statutory speed limits that more often require signs to be effective . 70 mph limits on freeways and 65 mph limits on expressways require signs to be effective . The default speed limit on these types of roads is 55 mph as they do not directly interact with the built - up environment . In the densest urban districts a statutory 25 mph limit is effective when adequate signage is used, as are 35 mph limits in areas of light development . The same applies to 45 mph limits on highways designated as "rustic" roads . However, "an alleged failure to post (such a speed limit sign) is not a defense to a prosecution" in the case of such statutory limits . </P> <P> Wyoming's highest speed limit is 80 mph, found on its Interstate highways, and 70 mph on its four lane divided highways . The speed limit for school zones is 20 mph, 30 mph in urban districts and residential areas, 70 mph for other paved roads, and 55 mph for unpaved roads. On I - 80 in Evanston and Cheyenne, I - 25 in Cheyenne and Casper, and I - 90 in Buffalo, the speed limit is 65 mph . </P> <P> In February 2014, the state Assembly passed a bill that would raise the speed limit from 75 to 80 mph on certain freeway segments that would meet safety standards . The bill passed the Senate on Feb 25 and raised the speed limit on certain freeway sections to 80 mph on July 1, 2014 . However, an attempt to raise the speed limit to 70 on two lane highways such as Wyoming 120 and US 14 was turned down that same month, but this same provision became law in February 2015 . On February 1, 2016, the speed limit on WY 120 (two lane highway) from the Chief Joseph Highway to the Montana border increased to 70 mph . Two other two lane highway sections, WYO 130 from Interstate 80 south to Saratoga and US 85 from east of I - 25 to Newcastle, increased to 70 mph . </P>

What is the speed limit on interstate 25 in wyoming