A door number panel displays the car number on both side doors. It identifies vehicles for officials, teams, and spectators. Proper visibility is required for accurate scoring. During inspection officials confirm size, font, and placement compliance. Teams use contrasting colors for maximum legibility. Drivers benefit from quick recognition during close racing. Officials track performance and penalties by door number. Panels must remain securely attached throughout the event. Maintenance includes cleaning and replacement if damaged. Door number panels support broadcast coverage and commentary. Visibility assists pit road and trackside communication. Accurate identification maintains operational clarity. Door number panels are essential for organized competition.
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