Governor signs bill to increase speed limits on turnpikes, highways Thu, 04/25/2019 - 12:00am Gov. Kevin Stitt today signed a bill into law that will increase the speed limit on Oklahoma turnpikes from 75 ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today! Read more about Governor signs bill to increase speed limits on turnpikes, highways