Analysis of the Long-Term Variations in Traffic Capacity at Freeway Bottleneck
| Autor: | Hodaka Kai, Yasuhiro Shiomi, Jian Xing, Tomoya Katayama |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
050210 logistics & transportation
Mechanical Engineering Traffic capacity 05 social sciences Variation (game tree) 01 natural sciences Bottleneck 010305 fluids & plasmas Term (time) Transport engineering 0502 economics and business 0103 physical sciences Environmental science Civil and Structural Engineering |
| Zdroj: | Transportation Research Record: Journal of the Transportation Research Board. 2673:390-401 |
| ISSN: | 2169-4052 0361-1981 |
| DOI: | 10.1177/0361198119842124 |
| Popis: | In this paper, the long-term variation in traffic capacity at nine typical bottlenecks on intercity expressways in Japan is analyzed. The evaluation indices of traffic capacity are defined based on three factors: the ease of phase transition from free flow to congested flow is represented by the fifth-percentile traffic volume of breakdown probability; its reliability is defined by the gap between the 50th- and fifth-percentile traffic volume of breakdown probability; and the smoothness of traffic flow after the capacity drop is evaluated as the mean of the queue discharge flow rate. The findings show that: (i) the fifth-percentile traffic volume of traffic breakdown probability shows a long-term decreasing tendency, and the values in August and December are lower than the yearly average; and (ii) the gap between the 50th- and fifth -percentile traffic volume of traffic breakdown probability and discharge flow rate tend to decrease, but the trends are not significant. Finally, we suggest that the decreasing trends might be attributed to slight changes in driving skills, driving characteristics, or vehicle types. |
| Databáze: | OpenAIRE |
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