If the variable message signs indicate that cars with an environmental label B may use an HOV lane, what is the minimum occupancy the vehicle must have?
Traffic rules
Explanation
**High Occupancy Vehicle (HOV) lanes** are designed to facilitate the transit of vehicles carrying multiple people, thereby reducing congestion and pollution. However, there are exceptions to this general rule.
- **Vehicles with an environmental badge B** can use the HOV lane with **only one occupant** if indicated by the variable message signs. This is because the authorities may grant circulation benefits to vehicles with a lower environmental impact, such as those with environmental badges.
- Environmental badges classify vehicles according to their level of pollutant emissions. The B badge is one of these types and allows certain advantages in circulation, such as using the HOV lane with only one occupant in specific situations.
Therefore, if the variable message signs allow it, a passenger car with an environmental badge B can use an HOV lane with **only one occupant**.
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