| Title |
Freeway Congestion Information Display Criteria Considering Drivers" Recognition |
| Keywords |
congestion level;traffic information;drivers" recognition;travel speed;혼잡수준;교통정보;운전자 인지;통행속도 |
| Abstract |
With advanced technologies applied to transportation, realtime traffic information has been necessary for not only drivers but also agencies. In normal, traffic conditions have been represented to three levels according to congestion: "free", "slow", and "jammed", Those categories and criteria are set up for traffic management even though traffic information is provided for drivers. This study examines how drivers feel current congestion levels and delves into traffic categories and criteria which they recognize. To collect data for drivers" recognition, a survey of freeway travellers is conducted answering the question about traffic flow speed from video image on a freeway section. In the result of the survey, the surveyee preferred a 4-level traffic condition including "delayed" to 3-level traffic condition. As its criteria, 20 ㎞/h, 50 ㎞/h, and 75 ㎞/h were obtained. These results are expected to contribute to building more appropriate traffic information for drivers and providing an operational guideline for Traffic Monitering Centers. |