What are the elements of a dangerous condition cause of action?

The elements of a dangerous condition cause of action are: "(1) a dangerous condition existed on the public property at the time of the injury; (2) the condition proximately caused the injury; (3) the condition created a reasonably foreseeable risk of the kind of injury sustained; and (4) the public entity had actual or constructive notice of the dangerous condition of the property in sufficient time to have taken measures to protect against it." (Brenner v. City of El Cajon (2003) 113 Cal.App.4th 434, 439.)