Route search and navigation apparatus and storage medium storing computer programs for navigation processing with travel difficulty by-pass

摘要: The present invention prevents execution of a detour route search, responsive to and in accordance with received VICS data, where certain conditions are not met. To this end, the system calculates time RT1 required for vehicle move from its location first point must turn right or left follow previously determined guidance also CT conduct re-search based on data. If RT1≦CT then performs On other hand, if RT1