What act enhances a Class B penalty to a Class A for obstructing a highway or other passageway?

The enhancement of a Class B penalty to a Class A penalty for obstructing a highway or other passageway is associated with the act of reckless driving. This connection underscores the seriousness of obstructing traffic when it involves reckless behavior that endangers public safety. Reckless driving typically involves operating a vehicle in a manner that shows a willful disregard for the safety of persons or property, which contributes to the severity of the offense when it results in obstruction.

In contrast, the other actions, such as driving under the influence, unauthorized use of a vehicle, or failure to yield, though serious in their own rights, do not directly tie into the statutory enhancement of penalties for obstruction in this specific context. Thus, the law specifically designates reckless driving as the act that escalates the penalty to reflect the increased risk posed to public safety when such a violation occurs.