| Title |
A Study on the Modification Value for Estimation of Traveling Speed During Rainfall in Interrupted Traffic Flow |
| Authors |
모무기(Mo, Moo Ki) ; 이승주(Lee, Seung Joo) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.5.0837 |
| Keywords |
단속교통류;통행속도;강우시;보정계수 Interrupted traffic flow;Travel speed;Rainfall;Modification factor |
| Abstract |
Generally, V/C ratio in uninterrupted traffic flow and average travel speed in interrupted traffic flow are utilized as measure of effect for assessing operational situation of roads. The set of road conditions and traffic conditions are considered to be major variables for assessing operational situation in the traffic flow. However, weather conditions such as rainfall also affect the operational situation of roads. The studies reflected by the rainy situation are conducted in the uninterrupted flow, but the related studies are insufficient in the interrupted flow. In this study, the modification factors during rainfall in the interrupted flow were suggested, and the factors could be used when calculating the average travel speed during rainfall in the interrupted flow. By utilizing the data that were investigated in the same road and traffic conditions and the different weather conditions (rainy day or clear day), the modification factors were founded on regression analysis of the travel speed during rainfall as a dependent variable. Modification factors was suggested in dividing peak time, non-peak time, and whole period. Based on this study, the modification factors can be used to complementing the average travel speed model for assessing the operational situation of urban streets during rainfall. |