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PROGRESSION ADJUSTMENT FACTORS FOR UNIFORM DELAY AT SIGNALIZED INTERSECTIONS.
| 题名： | PROGRESSION ADJUSTMENT FACTORS FOR UNIFORM DELAY AT SIGNALIZED INTERSECTIONS. |
| 作者： | Benekohal-RF; El-Zohairy-YM |
| 关键词： | ADJUSTMENT-FACTORS; ESTIMATES-; FIELD-STUDIES; HIGHWAY-CAPACITY-MANUAL; PLATOON-ARRIVALS; PROGRESSIVE-TRAFFIC-SIGNAL-CONTROL; RANDOM-ARRIVALS-TRAFFIC; REVISIONS-; SIGNALIZED-INTERSECTIONS; TRAFFIC-DELAY; TRAFFIC-SIGNAL-CONTROL-SYSTEMS |
| 摘要： | Signal progression plays an important role in controlling arrival pattern and delay at coordinated signalized intersections. In the "Highway Capacity Manual" (HCM), one random and five nonrandom arrival types are identified. The delays for nonrandom arrival cases (platoon arrivals) are computed by applying progression adjustment factors (PFs) to the delay for the random arrival case. However, HCM-estimated delays are found to be significantly different from field-measured delays for Arrival Types 1, 4, and 6. For Arrival Type 2 the HCM estimations are acceptable, although the deviations are still relatively high. For Arrival Types 3 and 5 the HCM estimates the delays accurately. These findings suggest that the HCM PFs need to be revised. A new set of PFs was developed using the arrival-based delay models. A relationship between the effective green ratio, g/C, and the new PFs was established for each arrival type. With the proposed PF values, the HCM approach would be more accurate than it is with the current PF values. For Arrival Type 1, the new PF values are higher than the current HCM values for g/C 0.50. For Arrival Types 2 and 4, the new PF values are lower than those of HCM, as expected, because the HCM overestimates the delays for both Arrival Types 2 and 4. For Arrival Type 6 the new PF values are lower for g/C |
| 总页数： | Transportation Research Record. 1999. (1678) pp32-41 (9 Fig., 3 Tab., 16 Ref.) |
| 报告类型： | 科技报告 |
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- Highway Capacity and Quality of Service. Transportation Research Record.
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- PROGRESSION FACTOR FOR QUEUE LENGTH AND OTHER QUEUE-RELATED STATISTICS.
- Arrival-Based Uniform Delay Model for Oversaturated Signalized Intersections with Poor Progression.
- ESTIMATING INTERSECTION APPROACH DELAY USING 1985 AND 1994 "HIGHWAY CAPACITY MANUAL" PROCEDURES.
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