 The entirety of the Creek Turnpike has been recognized as important to the country 's economy , defense , and mobility by its inclusion in the National Highway System . In 2011 , the highest average annual daily traffic ( AADT ) count was 26 @,@ 900 vehicles eastbound and 26 @,@ 476 vehicles westbound between the Yale Avenue and Memorial Drive interchanges . The lowest AADT counts , 4 @,@ 426 vehicles eastbound and 4 @,@ 463 vehicles westbound , were recorded between the 11th Street interchange and the northeastern terminus . Law enforcement along the Creek Turnpike is provided by Oklahoma Highway Patrol Troop XE , a special troop assigned to the turnpike . 
