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Trans. Planning Journal
| Title | Queue Discharge Characteristics and Analytical Models of Shared Straight-Through/Right-Turn Lanes with Left-Turn Box and Waiting Box |
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| Author | Chiung-Wen Chang, Feng-Bor Lin, Pin-Yi Tseng |
| Summary | To facilitate traffic movement, a shared straight-through/right-turn lane may have a two-stage left-turn box downstream of the stop line and a waiting box upstream of the stop line for motorcycles. This study uses field data col-lected in the Taipei metropolitan area to examine and model the queue dis-charge characteristics of the vehicles in the two-stage left-turn box, the waiting box, and the roadway upstream of the waiting box. The field data reveals that the queue discharge time in the two-stage left-turn box has a statistically sig-nificant linear relationship with the number of motorcycles per unit width of the box. The discharge time from the two-stage left-turn box is usually very short and thus rarely affects the discharge of the queuing vehicles at the stop line. The queue discharge time and the number of motorcycles that can be discharged from a waiting box can be estimated from simple models. The queue discharge characteristics of the mixed vehicles upstream of the waiting box are very com-plex but can be realistically represented by an 8×4×1 artificial neural network model. This study integrates these models into one to estimate the capacity of a shared straight-through/right-turn lane that has a waiting box. |
| Vol. | 37 |
| No. | 3 |
| Page | 263 |
| Year | 2008 |
| Month | 9 |
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