If a windshield has a crack longer than what measurement should the vehicle be rejected?

A vehicle should be rejected if the windshield has a crack longer than 6 inches. This is because a crack of this length can significantly obstruct the driver's view and may compromise the structural integrity of the windshield, making it less effective in protecting the occupants during an accident. Windshields play a crucial role in the overall safety of the vehicle, and any damage that could impair visibility or the strength of the windshield must be taken seriously. Cracks shorter than this measurement may be deemed acceptable under certain conditions, but exceeding this length is a clear reason for rejection during a state inspection.