 This is about 9% of the total road mileage in the state, including Oregon's portion of the Interstate Highway System (729.57 mi/1,174.13 km) and many other highways ranging from statewide to local importance.Transfers of highways between the state and county or local maintenance require the approval of the Oregon Transportation Commission (OTC), a five-member governor-appointed authority that meets monthly.These transfers often result in discontinuous highways, where a local government maintains part or all of a main road within its boundaries.