Method and system for determining risk areas in road traffic

1. A method, comprising:

receiving position data from a mobile device transported by a road user;

receiving information on a type of means of transportation associated with the mobile device;

incrementing a counter variable associated with a predefined geographic area that includes a position of the position data, said counter variable representing the number of road users who are present in said geographical area;

incrementing a counter variable further comprising incrementing a counter variable for said type of means of transportation;

initializing a time variable, said time variable set to a predefined value and decremented continuously;

decrementing said counter variable in response to expiration of said time variable; and

providing the road user with traffic data for a geographical area based on said variables.

2. The method of claim 1 further comprising receiving a request from a second mobile device and transferring one or more counter variables in a predefined geographic area that includes the position of the second mobile device.

3. The method of claim 1 wherein the predefined value is an expected value defining an average length of stay of the mobile device in the predetermined geographic area for a type of means of transportation, said type associated with the mobile device.

4. A system, comprising:

one or more mobile devices transported by one or more road users; and

a server;

wherein the server is adapted to receive position data from the one or more mobile devices, to receive information on types of means of transportation associated with the mobile devices, to increment a counter variable associated with a predefined geographic area that includes a position of the position data, said counter variable representing the number of road users who are present in said geographical area, wherein incrementing a counter variable further comprises incrementing a respective counter variable for the type of means of transportation, and to initialize a time variable, said time variable set to a predefined value and decremented continuously, said server further adapted to decrement said counter variable in response to expiration of said time variable.

5. The system of claim 4 wherein the server is further adapted to store one or more counter variables and time variables for each geographic area that includes a received position.

6. The system of claim 4 wherein said server is further adapted to receive a request from a mobile device and to determine one or more counter variables in a predefined geographic area that includes the position of the mobile device.

7. The system of claim 4 wherein the predefined value is an expected value that defines an average length of stay of a mobile device in the predefined geographic area for a type of means of transportation.