Okla. Stat. tit. 69, § 69-1207

Whenever a part of a parcel of land is to be taken for state

highway purposes and the remainder is to be left in such shape or

condition as to be of little value to its owner, or to give rise to

claims or litigation concerning severance or other damage, the

Department may acquire by condemnation or as otherwise provided by

law the whole parcel and may sell the remainder or may exchange the

same for other property needed for state highway purposes. The

Department shall also have authority to acquire lands or interests

therein to be used as passageways between tracts of land severed by

limited access highways and to convey the same to the owners whose

land is so severed.