Which of the following is classified as a major traffic offense in Illinois?

Driving while suspended or revoked is classified as a major traffic offense in Illinois due to the serious implications it has for public safety. This offense indicates that the driver is operating a vehicle while their driving privileges have been legally withdrawn, which poses significant risks not only to the driver but to other road users as well.

In contrast, speeding 15 to 25 over is typically considered a less severe traffic violation, often resulting in a citation rather than a criminal charge. Driving with a valid driver's license is the standard expectation for lawful driving and is not an offense at all. Parking violations, while they can incur fines, do not affect one’s driving record or indicate a disregard for traffic safety in the same way that driving while suspended or revoked does. Thus, the gravity of driving while suspended or revoked distinguishes it as a major traffic offense within Illinois law.