The National Association for Stock Car Auto Racing (NASCAR) is the sanctioning body for the NASCAR Cup Series, the Xfinity Series and the Camping World Truck Series. NASCAR also administers a number of regional racing series, including the Whelen Modified Tour, and the Whelen All-American Series, as well as international series in Canada, Mexico, and Europe. Similar to other professional motor racing leagues and sanctioning bodies, NASCAR has been a target of criticism on a variety of issues. Some critics note the significant differences between present day NASCAR vehicles and true "stock cars". Another topic of debate has been NASCAR's move to larger markets; in 1997, NASCAR added the California and Texas Motor Speedway, respectively located in the metro areas of Los Angeles and Dallas. This caused NASCAR to move away from traditional tracks such as Rockingham, which has led to some fans feeling that NASCAR abandoned its core market. Others cite the dominance of the France family (and Brian France in particular) in NASCAR's business structure, policies, and decision making. Recently, the increased number of Cup drivers competing consistently in the Xfinity Series races has been frequently debated. NASCAR has been challenged on the types and frequency of caution flags, with some critics suggesting the outcome of races is being manipulated, and that the intention is not safety, as NASCAR claims, but closer racing. Since its peak in 2005, NASCAR has seen a gradual decline, with its TV viewership reaching record lows in 2018 and race day attendance suffering to record lows as well. Reasons cited for its decline include the aforementioned track changes, the introduction of the Car of Tomorrow which both drivers and fans alike criticized, the constant tinkering of the rules of its championship and the racing itself, the change in its race day experience, the perceived decline in the quality of its racing, NASCAR changing its image to appeal to a more mainstream audience while alienating its southern fanbase and the retirement of its past stars, such as Jeff Gordon, Dale Earnhardt Jr, Tony Stewart, Carl Edwards, and others. Another general area of criticism, not only of NASCAR, but other motorsports as well, includes questions about fuel consumption, emissions, engine noise levels, and pollution, and the use of lead additives in the gasoline. Changes in stock car style Beginning in the early 2000s, NASCAR researched and worked on a new model to introduce towards the