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OPERATIONAL ANALYSIS OF TERMINATING FREEWAY AUXILIARY LANES WITH ONE-LANE AND TWO-LANE EXIT RAMPS: A CASE STUDY.
| 题名： | OPERATIONAL ANALYSIS OF TERMINATING FREEWAY AUXILIARY LANES WITH ONE-LANE AND TWO-LANE EXIT RAMPS: A CASE STUDY. |
| 作者： | Batenhorst-RA; Gerken-JG |
| 关键词： | Auxiliary-lanes; Case-studies; Dallas-Texas; Freeway-operations; Freeways-; Geometric-design; Interchanges-; Off-ramps; One-lane-exit-ramp; Operational-analysis; Software-packages; Two-lane-exit-ramp; Weaving-sections |
| 摘要： | This paper summarizes the findings of a case study on the operational analysis of weaving areas created by auxiliary lanes between two successive interchanges. For auxiliary lanes less than 1,500 ft (457 m) in length, American Association of State Highway and Transportation Officials lane balance principles permit the termination of the auxiliary lane with a one-lane exit ramp. For auxiliary lanes greater than 1,500 ft (457 m) in length, the lane balance principles require that the auxiliary lane be dropped with a two-lane exit ramp or tapered into the through roadway downstream of a one-lane exit ramp. The operational analyses of the case study were conducted as part of a Major Investment Study (MIS) in Dallas, Texas. As part of the study, auxiliary lanes were recommended at various locations along two major freeway corridors. At twenty of these locations, additional analyses were conducted to compare the quality-of-service provided by a one-lane exit ramp versus a two-lane exit ramp. The range of traffic and geometric conditions among the twenty sites varied. The analyses were conducted using three software packages: the Highway Capacity Software (HCS), CORSIM and Synchro/Simtraffic. The findings of the case study suggest that a one-lane exit ramp may provide the best traffic operations regardless of weaving length. The experience gained from the case study is presented to aid practitioners in the design of safe and efficient freeway facilities and to aid researchers in current and future efforts to define and understand the operational effects of geometric design. |
| 总页数： | Conference Title: Mid-Continent Transportation Symposium 2000. Location: Ames, Iowa. Sponsored by: Iowa State University |
| 报告类型： | 科技报告 |
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