In this cross between Duel and I Saw What You Did, two brothers pranking with a CB radio attract the attention of a sicko piloting a big rig. Steeped in the Americana of truck stops and motels, this widescreen chiller is designed to appeal to retro sensibilities. The heroes drive a 1971 Chrysler Newport. The platonic romance of college students Paul Walker and Leelee Sobieski harks back to the Dobie Gillis era; so does the prevalence of scenes in which males are feminized or humiliated. The script, co-written by former local musician Clay Tarver (Chavez, Bullet LaVolta), is garnished with oddball lines. The one I liked best was Sobieski's deadpan observation, after she and her roadmates pass the series of Burma Shave-style messages their tormentor has left for them, that "that's a pretty elaborate thing to do, to paint those road signs." Director John Dahl (Red Rock West, The Last Seduction) has a reputation for cleverness and style, but in trying to make a dumb thriller that stays just a little above the normal level of dumb thrillers, he comes off here as merely skillful when not mechanical (the prolonged climax is more aggravating than suspenseful). At the Entertainment, Holiday, Hoyts Providence 16, Showcase, and Tri-Boro cinemas.