For the most part, the callers were calm, patiently asking for the fastest path out of New Orleans or some other Gulf Coast city as Hurricane Gustav twisted its way to the northwest. They started calling General Motors’ OnStar service by the thousands early Saturday, and by Sunday, their numbers had grown to well over 3,000 per hour. “There’s a lot of people that are stranded on the evacuation routes,” said Brad Williams, a service manager for the automaker’s motorist help line who was overseeing OnStar’s response from a command center in downtown Detroit.
