According to SAE, the recommended flash rates for lights are between which values?

• A. 1-3 Hz
• B. 2.2-8 Hz
• C. 3-10 Hz
• D. 5-15 Hz

Answer: (B)

The correct range for the recommended flash rates for lights, according to the Society of Automotive Engineers (SAE), is between 2.2 to 8 Hz. This specification is critical for ensuring that emergency vehicle lights are both effective in alerting other drivers and compliant with safety standards.

A flash rate within this range allows other drivers to notice and respond to emergency vehicles in a timely manner, thus enhancing safety during emergency responses. Additionally, maintaining this frequency helps prevent desensitization among drivers, as excessively slow or fast flashing can lead to lower alertness or confusion regarding the presence of emergency vehicles. Understanding and adhering to these guidelines ensures that emergency lights are utilized effectively during operations, maximizing visibility and ensuring safety on the roads.