California HOV Stickers for Plug-In Hybrids Are Almost Gone By Luke Vandezande May 25 2015 Share this Article Tweet The number of HOV single occupant exemption stickers available in California for plug-in hybrid owners is dwindling. Continue Reading... Filed under: Featured ArticlesTags: california, California HOV lane, Caliornia, hov stickers, phev, plug-in hybrids