What do you do to use carpool lanes marked with a diamond symbol?

To use carpool lanes marked with a diamond symbol, ensure that your vehicle meets the occupancy requirements, typically having two or more passengers, including the driver. Always check local regulations, as requirements may vary by location. Enter and exit the carpool lane safely, using designated points, and be aware of any time restrictions that may apply. Also, keep an eye out for any enforcement measures to avoid fines.