Cal. Streets and Highways Code § 30402

In eminent domain proceedings to acquire property for any of the purposes of this chapter, any transportation facilities, additional transportation facilities, real property, personal property, franchises, rights, easements, or other property or privileges appurtenant thereto appropriated or dedicated to a public use or purpose by any person, private, public, or municipal corporation, county, city, district, or any political subdivision of the state may be condemned and taken and the acquisition and use thereof as provided in this chapter for the same public use or purpose to which such property has been appropriated or dedicated or for any other public use or purpose shall be deemed a superior and permanent right and necessity, and a more necessary use and purpose than the public use or purpose to which such property has already been appropriated or dedicated, except as to real estate, personal property, franchises, rights, privileges, or easements actively used by or necessary for the operation or a common carrier by railroad other than those used primarily by such railroad for the transportation of persons or property by interurban operation to and from an area within 50 miles from either end of any toll bridge or other toll highway crossing acquired or constructed pursuant to this chapter. Except for such prior railroad use, it shall not be necessary in any eminent domain proceedings pursuant to this section to plead or prove any acts or proceedings preliminary or prior to the adoption of the resolution required by Section 1245.220 of the Code of Civil Procedure.