Commercial Driver’s License (CDL) Practice Exam 2025 – All-in-One Guide to Master Your CDL Test!

A "serious traffic violation" for CDL holders includes offenses that can significantly impact public safety and the operation of commercial vehicles. Driving under the influence and hit-and-run offenses are classified as serious violations because they involve reckless behavior that endangers not only the driver but also other road users. Such violations can lead to severe penalties, including the possibility of license suspension or disqualification from operating commercial vehicles.

In contrast, the other options, such as driving without a seatbelt, exceeding the speed limit by a minor margin, or parking violations, typically do not carry the same severe implications. While these actions may still be subject to enforcement and fines, they are not categorized as "serious traffic violations" under the standards set for CDL holders. Serious violations are taken seriously because they demonstrate a blatant disregard for road safety and regulations, which could lead to catastrophic outcomes in the context of operating larger, potentially more dangerous vehicles.