 SH-37 runs for in Grady County, serving as the northern terminus for SH-92 on the west edge of Tuttle, and intersecting SH-4 in Tuttle before crossing into McClain County.One mile into McClain County, SH-37 serves as the northern terminus for SH-76, then joins I-44 for a brief concurrency three miles later.SH-37 overlaps I-44 for three miles (5 km), running north across the Canadian River into Cleveland County and Oklahoma City, where it runs east along S.W.