Cal. Sts. & High. Code § 30411

Whenever, either before or after the construction or reconstruction of streets, sidewalks, or other like facilities upon any property or interest in property acquired pursuant to this chapter, it appears desirable to dedicate the property to public use for such purpose, the director, with the approval of the commission, may dedicate or transfer the property to any county, city, or other public or municipal corporation within which it is located, subject, however, to any rights or interests necessary for the proper construction, maintenance, and operation of any bridge, highway crossing, or transportation facility which extends through, over, under, on, or across the property.