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Estimation of Queue Lengths and Their Percentiles at Signalized Intersections
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wu, Ning Xiang |
| Copyright Year | 1998 |
| Abstract | Queue lengths are important parameters in traffic engineering for determining the capacity and quality of traffic control equipment. At signalized intersections, queue lengths at the end of red time (red-end) are of greatest importance for dimensioning the lengths of lane. While the average queue length reflects the capacity of traffic signals, the so-called 95th and 99th percentile of queue lengths at red-ends are used for determining the length of turning lanes, such that the risk of a blockage in the through lanes could be minimized. Furthermore, lengths of back-of-queue (queue length at queue-end) must be considered for determining the lengths of turning lanes at signalized intersections. The queue length and their distribution can be numerically calculated from Markov chains. The percentiles of queue lengths can be estimated from the distribution. Based on the results of Markov chains, regression are undertaken from obtaining explicit formulas under stationary traffic conditions. For non-stationary traffic conditions, the formulas can be derived using the so-called transition techniques. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://homepage.rub.de/Ning.Wu/pdf/Q_Signal_copenhagen.PDF |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
