Route planning system, route planning method and traffic information update method

A route planning method, comprising:

• searching a plurality of possible routes according to a departure time, a departure point, and a destination point, wherein each of the possible routes comprises a plurality of possible road sections from the departure point to the destination point;
• and
• calculating a plurality of total travel times corresponding to the possible routes respectively;
• wherein calculating the total travel time corresponding to one of the possible routes comprises dynamically searching a plurality of average speed rate data of a plurality of corresponding time intervals according to the possible road sections of the possible route;
• wherein dynamically searching the average speed rate data of corresponding time intervals according to the possible road sections and the distances comprises searching the time intervals of a plurality of estimated passing time of the possible road sections starting from the departure time sequentially to receive the average speed rate data of the possible road sections at each estimated passing time.

A driving information update method comprising:

• receiving a time data, a location data and a speed data uploaded by an electrical device;
• searching a corresponding road section data according to the location data and the time data, wherein the road section data includes a plurality of average speed data corresponding to a plurality of time intervals;
• and
• adjusting the average speed data corresponding to the time interval of the time data in the road section data according to the speed data.