U-Turn Laverne
   The drive through the San Joaquin Valley favors Spanish-speaking  evangelicals.  From the bottom of the  Grapevine to the City of Modesto, 95% of the 48 radio stations that reach this  area broadcast in Spanish, religious zealotry or both.      Before the I-5 opened in the  1960s, driving to San Francisco on U.S. 99 took  you through the middle of every hick town there was north of Bakersfield.   The I-5 turned out to be a straight shot along the west side of the  central valley that took far less time but provided drivers with fewer stimuli  than a sensory deprivation tank. Driving alone to Munson's on the I-5 was a  long and monotonous chore that always sent me searching the radio dial for a  distraction.      Popular music has never had  any appeal to me.  In any other  circumstance, it would be a toss up between listening to Cher  for five hours and undergoing a colonoscopy.   On second thought, schedule the colonoscopy.      On my trips north o...