What should a driver do if they encounter an accident on an express road?

Answer: B — Use the emergency phone

Using the emergency phone is the appropriate action for a driver who encounters an accident on an express road. Emergency phones are strategically placed along expressways to facilitate quick reporting of incidents. By using the emergency phone, drivers can efficiently notify the authorities, ensuring that help is dispatched to the scene as quickly as possible. This action is crucial not only for the safety of those involved in the accident but also for other road users who may be affected by the incident. In contrast, leaving the scene could result in legal consequences, as drivers are typically required to remain and provide assistance or information until help arrives. Waiting for help without alerting authorities delays emergency services and can exacerbate the situation. Similarly, doing nothing if the accident doesn’t seem serious undermines the importance of reported incidents, as they can have unforeseen consequences or require medical attention.