Which of the following does not constitute an uninsured motor vehicle?

A vehicle with adequate bodily injury liability insurance is considered a covered vehicle rather than an uninsured one. This is because the insurance provides financial protection for bodily injury claims resulting from an accident that the insured is responsible for. In contrast, other options represent scenarios where the vehicle either lacks sufficient insurance coverage or is involved in situations that qualify as uninsured.

Regarding the hit-and-run vehicle, this scenario often falls under insured motorist coverage, as the driver cannot be identified or held accountable. Similarly, a vehicle that is underinsured does not meet the threshold for adequate coverage for potential claims, thus classifying it as uninsured in the specific context of sufficient coverage. Lastly, a vehicle whose insurer has denied coverage is also deemed uninsured because it lacks valid insurance protection at the time of the incident.