Which of the following is an example of a minor traffic incident?

A minor traffic incident typically refers to situations where the impact on traffic flow is minimal and there are no significant injuries involved. In this instance, non-injury collisions fit this definition perfectly, as they indicate an accident where vehicles may sustain damage but the occupants are unharmed. This allows for a quicker resolution of the incident, often with less involvement from emergency services, compared to more serious incidents.

In contrast, multi-vehicle accidents involve more complexity, as they can lead to significant traffic disruptions, potential injuries, and a longer resolution time. Major road obstructions can severely impact traffic flow and may require extensive management to restore normal conditions. Lastly, hazardous material spills pose serious safety risks and often necessitate specialized response teams, indicating that they are far from minor incidents. These other options highlight the severity and impact that categorize them as major traffic incidents rather than minor ones.