(NASDAQ:TSLA) DALLAS--(BUSINESS WIRE)--Attorney and traffic safety expert Amy Witherite, who has spent more than 30 years handling trucking safety cases, was among the first to warn that autonomous 18-wheelers pose unacceptable risks on U.S. highways. Now, she is being joined by prominent short sellers, industry insiders, and even OEM partners who say the technology is potentially unsafe and uneconomical. “These are 80,000-pound machines traveling at highway speeds next to families in passenger cars,” Wither