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MACRO SPEED-FLOW MODEL FOR ON- AND OFF-RAMPS ON MULTILANE ROADS.
| 题名： | MACRO SPEED-FLOW MODEL FOR ON- AND OFF-RAMPS ON MULTILANE ROADS. |
| 作者： | Carlsson-A; Cedersund-H-A |
| 关键词： | Flow-speed-relationships; Freeways-; Highway-capacity; Lane-distribution; Multilane-highways; Off-ramps; On-ramps; Sweden-; Traffic-models |
| 摘要： | The National Road Administration in Sweden has initiated a comprehensive research project concerning traffic on multilane roads. The name of the project is TPMA for Traffic Performance on Major Arterials. A model for four-lane road segments was presented in Copenhagen in 1998. Now a macro model for freeway on- and off-ramps has been developed. This model is based on traffic data from twelve interchanges with several measuring spots in each interchange. Normally in Sweden the on-ramps are not regulated by any give way regulations to the main stream; instead, there is an acceleration lane for the on-ramp. The model for influence of on-ramps on the main road traffic consists of three submodels: (1) Model for lane distribution of the vehicles downstream the on-ramp; (2) Model for lane capacity; and (3) Model for speed-flow relationship. For off-ramps a model has been developed for lane distribution of the vehicles just upstream the off-ramp. The flow in the right lane is estimated as a non-linear function of the total flow and the off-ramp flow. |
| 总页数： | Conference Title: Fourth International Symposium on Highway Capacity. Location: Maui, Hawaii. Sponsored by: Transportation Research Board. Held: 20000627-20000701. Transportation Research Circular. 2000/06. pp142-154 (4 Fig., 1 Tab., 3 Ref.) |
| 报告类型： | 科技报告 |
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