>Aug. 26 is Maximum Speed Sunday on MTV (2:30 P.M. ET) as a dirty dozen or so of celebrity drivers, including Vince Neil and Tommy Lee of Mötley Crüe, Bruce Jenner, Don Johnson, Sam Kinison and members of Skid Row, show up for a Grand Prix race through the streets of Denver. On Tuesday (Aug. 28), Robert Urich hosts the Second Annual Valvoline National Driving Test on CBS (10 P.M. ET). Using such personalities as William Shatner, Joan Rivers and Lyle Alzado as well as you’re-be-hind-the-wheel simulations, the moderately informative special presents a 25-question quiz to gauge your driving skills.