| 摘要 |
PROBLEM TO BE SOLVED: To clarify 'no congestion' link. SOLUTION: When a traffic information is received, the presence or absence of 'no congestion' link is judged (S12). Then, it is judged successively whether or not the 'no congestion' link continues by the specified number (m) (S13), whether or not the 'no congestion' is surrounded with 'congestion' link, etc., (S14) whether or not a 'congestion' link exists between the present position and 'no congestion' link (15), etc., and when the 'no congestion' link is recommended to be utilized, it is highlighted and indicated (S16). |
