The U.S. car rental industry is still facing significant challenges, according to Car Rental Market Scan. Customer demand is down 10-15 percent compared to this period last year, and is taking longer to return to normal than was previously expected. While rental rates and fleet utilization are strong, demand and revenue are down, especially on the corporate travel side. Even robust leisure travel hasn't helped push the industry back to last summer's level of business. Market Scan is a subscriber information service tracking the auto rental industry and published by Abrams Travel Data Services, a specialized market research firm serving the global auto rental, allied travel, and transportation industries.