Can the police power doctrine be invoked in the construction of a public improvement where no emergency exists?

'* * * it should be obvious that the police power doctrine cannot be invoked in the taking or damaging of private property in the construction of a public improvement where no emergency exists. To hold otherwise would in effect destroy the protection guaranteed by our Constitution against the taking or damaging of private property for a public use without compensation.' Rose v. State of California, supra, 19 Cal.2d at page 730, 123 P.2d at page 515.