average us car age
253 million cars and trucks on U.S. roads; average age is 11.4 years. The average age of cars on U.S. roads is 11.4 years, IHS Automotive reports. The average age of cars on U.S. roads is 11.4 years, IHS Automotive reports. The average age of vehicles on U.S. roads has hit a plateau of about 11.4 years, according to an annual study by IHS Automotive, an auto industry research firm.