Atlanta midnight-movie buff Bret Wood has unearthed a fascinating topic—the graphic scare films produced for driver’s ed classes in the 50s and 60s—but his DV documentary is so muddled that it soon settles into the dull functionality of its subject matter. Ostensibly this chronicles the work of the Highway Safety Foundation, a Cleveland nonprofit that bankrolled such cautionary tales as Signal 30 (1959), Mechanized Death (1961), and Wheels of Tragedy (1963), yet its sketchy profiles of midwestern do-gooders who chased ambulances in search of gory footage are overwhelmed by educational-film clips on a variety of topics. A sensational allegation that HSF was shooting porn movies on the side turns out to be a red herring, apparently prompted by a 1964 police-training film that showed homosexual trysts in a public bathroom. And Wood, uncertain how to handle the archival material, hedges his bets with critical commentary from both educational-film scholar Richard Prelinger and camp-video marketer Mike Vraney. This is definitely worth a look if only for the clips, but it left me more frustrated than enlightened. 91 min.