- The speed limit on the H.E. Bailey Turnpike was raised recently to 80 miles per hour between Chickasha and Oklahoma City. The section from Chickasha south to Lawton will remain at 75 mph for the next few months, “until we finish an upcoming dowel bar refit project later this year,” state Transportation Department spokeswoman Lisa Shearer-Salim said. CURTIS W. AWBREY | SOUTHWEST LEDGER