| 主权项 |
1. A method of a navigation system to identify a bi-modality condition, the method comprising:
determining, with a processor of the navigation system, a distribution of speeds associated with a plurality of probe points representative of travel along a road segment upstream of diverging downstream road segments; evaluating, with the processor of the navigation system, the distribution so as to cluster the speeds associated with the plurality of probe points into a higher speed cluster associated with a higher speed and a lower speed cluster associated with a lower speed; identifying, with the processor of the navigation system, the bi-modality condition upstream of the diverging downstream road segments based upon a relationship between the higher speed and the lower speed, wherein identifying the bi-modality condition comprises determining a difference between the higher speed and the lower speed, determining a magnitude of bi-modality based upon the difference and identifying the bi-modality condition based upon a comparison of the magnitude of bi-modality to a predefined threshold; determining, with the processor of the navigation system, an extent of the bi-modality condition upstream of the diverging downstream road segments; causing a notification of the bi-modality condition to be provided by the navigation system; and predicting, with the processor of the navigation system, an estimated time of arrival that takes into account the bi-modality condition. |
