the most significant road in west tulsa is southwest boulevard (originally called quanah avenue until the middle to late 1950s), which was formerly part of route 66. other principal streets in west tulsa include west 21st street, west 41st street, west 51st street, and the principal avenues are south 65th west avenue, south 57th west avenue, south 49th west avenue, south 33rd west avenue, south union avenue, and south elwood avenue.