Drivers are divided into four categories by the governing body: Platinum, Gold, Silver and Bronze, depending on their achievements and professional status.
Platinum and Gold are typically for the highest-class drivers, with Silver and Bronze reserved for either gentlemen or up-and-coming drivers in the sport.
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Jordan Taylor, known for being one of the more outspoken and quirky TUDOR United SportsCar Championship drivers on social media, took to Twitter last week to provide one of the funniest takes on driver ratings yet.
Taylor, the 2013 GRAND-AM DP champion and two-time race winner in the TUDOR Championship this year, left a note on a car in a parking lot, which took up two parking spaces, proclaiming the unsuspected driver to Bronze rating.