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Trans. Planning Journal
| Title | Ramp Traffic Control Model on Freeway |
|---|---|
| Author | Yuan-Ching Hsu, Tun-Pei Chung |
| Summary | Freeway system are characterized as being continuous, uninterrupted, and with all exits and entrances being regulated entirely. So we can treat the freeway system as a pipe system. The traffic flow on the mainline of freeway is propagated in a manner similar to waves in the theory on compressible fluid. And the above-mentioned characteristics are helpful to applying fluid dynamics in the freeway traffic wave models. In this study, freeway is divided into fundamental sections and ramp traffic impact area. We can describe the phenomenon of freeway traffic flow with node continuity, macroscopic traffic stream models and conservation of vehicles equation developed by Lighthill, Whitham and Richards. Then we can obtain first-order wave model and high-order wave model. After that, we establish the ramp traffic control model by using the analytic method in first-order wave model with initial condition and boundary condition. Base on the ramp traffic control model, we discuss the interaction between ramp traffic and mainline traffic flow to provide the reference of ramp control strategies. |
| Vol. | 31 |
| No. | 1 |
| Page | 59 |
| Year | 2002 |
| Month | 3 |
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