Which of the following is NOT a possible outcome of a high speed hearing?

In the context of high speed hearings, the outcomes typically involve assessments of driving behavior and the imposition of penalties based on the severity of violations. License reinstatement is not an outcome of a high speed hearing; instead, such hearings primarily focus on determining penalties for driving offenses, such as high-speed violations.

The other options relate directly to consequences or evaluations that can arise from high-speed hearing decisions. A knowledge test may be required for drivers who need a reminder of the rules of the road or who have faced severe penalties. A 15-day suspension is a common penalty for high-speed violations, reflecting the state's efforts to enforce speed limits and maintain public safety. The Special On-Road Driver's Examination is also a possibility for someone whose driving record indicates potential safety issues, as it assesses the driver’s current skills behind the wheel after a serious violation.

Thus, the identified outcome of license reinstatement does not align with the typical results of high-speed hearings, which focus on penalties and assessments rather than restoring driving privileges without prior conditions being met.