What should drivers do if they notice reduced visibility while driving an ambulance?

When drivers experience reduced visibility while operating an ambulance, increasing following distances is the most prudent choice. This strategy allows for a safer response in the event of unexpected stops or changes in traffic conditions. With greater space between the ambulance and the vehicle ahead, drivers have more time to react, which is crucial for maintaining safety.

In challenging visibility conditions, such as fog, rain, or snow, it can be particularly difficult to judge distances and speeds accurately. Hence, maintaining a larger following distance helps mitigate the risks associated with these uncertainties, contributing to better overall control of the ambulance.

The other options are either unsafe or not practical. Speeding up can lead to more dangerous situations, especially when visibility is compromised. Using high beams may further reduce visibility by causing glare for both the driver and other road users under certain conditions, like fog or heavy rain. Calling for assistance, while sometimes necessary, does not directly address immediate driving safety or control.