List of Interstate Highways in Oklahoma explained

Caption:	Highway markers for Interstate 40, Interstate 240, and Interstate 40 Business
Formed:	August 14, 1957^[1]
Interstate:	Interstate X (I-X)
Label1:	Business Loops and Spurs:
Field1:	Interstate X Business (I-X Bus.)
Links:	OK
Map Custom:	yes
Map Notes:	Interstate Highways highlighted in red

Interstate Highways in Oklahoma form a network of freeways that cross the state. Several of them incorporated existing or already-planned turnpikes and continue to be maintained by the Oklahoma Turnpike Authority.^[2]

External links

• OKHighways by Eric Stuve

Notes and References

1. . Official Route Numbering for the National System of Interstate and Defense Highways as Adopted by the American Association of State Highway Officials . August 14, 1957 . Scale not given . Washington, DC . Public Roads Administration . March 3, 2013 . .
2. News: Cockerell . Penny . June 29, 2006 . 50 Years: As the intersection of Interstates 35, 40 and 44, Oklahoma is at America's crossroads . 1A, 2A . . . March 1, 2023.