1. A navigation system comprising: a communication interface configured to receive multimedia data including one or more images from a camera representative of traffic conditions along a road segment upstream of a junction; and at least one processor configured to: identify a multi-modality condition along the road segment upstream of the junction based upon an analysis of the multimedia data including the one or more images; evaluate a plurality of probe points representative of travel along the road segment upstream of the junction in accordance with a detection algorithm to separately determine whether the multi-modality condition exists along the road segment upstream of the junction; and determine whether to modify one or more tuning parameters of the detection algorithm based upon the multi-modality condition identified based upon the analysis of the multimedia data including the one or more images, wherein the communication interface is also configured to cause an alert message to be provided based upon the multi-modality condition identified based upon the analysis of the multimedia data including the one or more images.