To effectively start processing for dealing with jamming or regulation detected on a guide route.

When performing guidance along with a previously searched route while displaying guide routes 43 and 44 on roads 41 and 42 on a jamming/ regulation guidance picture 40, traffic information is received from communication media and jamming/regulation places 46, 47 and 48 are displayed. Concerning the traffic stop regulation to occur on the guide route 44 among these places, it is announced in voice and the start of detour search is reported.