Hour. But thats not stopping heated discussion about increasing the limit sometime soon. Ten years ago, iowas interstate speed limit went from 65 to 70. States surrounding iowa have similararimits. Illinois and wisconsin are also at 70 Miles Per Hour. But to the west, nebraska is at 75 and south dakota has a limit of 80 Miles Per Hour. Kcrgtv9s Iowa City Bureau chief mark carlson reports drivers and Law Enforcement have mixed views on whether iowa is due for a change. Johnson county shshiff Lonny Pulkrabek says hes not a fan of increasing the speed limit on iowas interstates, and the dot also has concerns. Data from the dot shows that in the year after iowa laststaised its speed limit from 65 to 70 Miles Per Hour fatalities more than doubled on iowas rural interstate system. But theyve gone back down. In 2014 the dot reported 2020eople died on rural interstates, the lowest while it appears lawmakers wont further debate iowas speed limit this session this debate will likely continue in