Okla. Stat. tit. 47, § 47-11-302: Passing vehicles proceeding in opposite directions

Drivers of vehicles proceeding in opposite directions shall pass

each other to the right, and upon roadways having width for not more

than one line of traffic in each direction each driver shall give to

the other at least one-half (1/2) of the maintraveled portion of the

roadway as nearly as possible.