(1) For the purpose of this chapter the highway authorities of the state, counties and incorporated cities and towns, respectively, or in cooperation one with the other, may acquire private or public property and property rights for limited access facilities and service roads, including rights of access, air, view and light, by gift, devise, purchase, or condemnation, in the same manner as such authorities are now or hereafter may be authorized by law to acquire property or property rights in connection with highways and streets within their respective jurisdictions. Except as otherwise provided in subsection (2) of this section all property rights acquired under the provisions of this chapter shall be in fee simple. In the acquisition of property or property rights for any limited access facility or portion thereof, or for any service road in connection therewith, the state, county, incorporated city and town authority may, in its discretion, acquire an entire lot, block or tract of land, if by so doing the interest of the public will be best served, even though said entire lot, block or tract is not immediately needed for the limited access facility.

(2) The highway authorities of the state, counties, and incorporated cities and towns may acquire by gift, devise, purchase, or condemnation a three-dimensional air space corridor in fee simple over or below the surface of the ground, together with such other property in fee simple and other property rights as are needed for the construction and operation of a limited access highway facility, but only if the acquiring authority finds that the proposal will not:

(a) impair traffic safety on the highway or interfere with the free flow of traffic; or

(b) permit occupancy or use of the air space above or below the highway which is hazardous to the operation of the highway.

Award of costs in air space corridor acquisitions: RCW 8.25.073.

Right-of-way donations: Chapter 47.14 RCW.