This measure would designate the portion of Interstate 5 between Magic Mountain Parkway, at postmile R53.565, and Valencia Boulevard, at postmile R52.465, in the City of Santa Clarita in the County of Los Angeles as the Los Angeles County Sheriff's Deputy Ryan Clinkunbroomer Memorial Highway. The measure would also request the Department of Transportation to determine the cost of appropriate signs showing this special designation and, upon receiving donations from nonstate sources covering the cost, to erect those signs.