Method and apparatus for navigation system for detecting and warning traffic rule violation

An apparatus for avoiding violation of carpool lane regulation for a navigation system, comprising:

• means for evaluating requirements prescribed by local carpool lane regulation for using a carpool lane of a road;
• means for determining a number of occupants of a vehicle with respect to using the carpool lane;
• means for determining whether the number of occupants of the vehicle satisfies the requirements for using the carpool lane;
• means for detecting a current location of the vehicle as to which lane the vehicle is running;
• means for detecting a lane change action for the carpool lane indicating that the vehicle enters the carpool lane or about to enter the carpool lane;
• and
• means for generating a warning for notifying violation of carpool lane regulation when the lane change action for the carpool lane is detected and the number of occupants fails to satisfy the requirements.