Models for determining minimum distance of ramps on urban expressway

LONG Ke-jun; YANG Xiao-guang; WANG Yue-hui; ZHOU Zhi-gang

Volume 5 Issue 1

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LONG Ke-jun, YANG Xiao-guang, WANG Yue-hui, ZHOU Zhi-gang. Models for determining minimum distance of ramps on urban expressway[J]. Journal of Traffic and Transportation Engineering, 2005, 5(1): 106-110.

Citation:

LONG Ke-jun, YANG Xiao-guang, WANG Yue-hui, ZHOU Zhi-gang. Models for determining minimum distance of ramps on urban expressway[J]. Journal of Traffic and Transportation Engineering, 2005, 5(1): 106-110.

Citation:

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Models for determining minimum distance of ramps on urban expressway

1.
School of Highway Engineering, Changsha University of Science and Technology, Changsha 410076, China
2.
Department of Traffic Engineering, Tongji University, Shanghai 200092, China

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Author Bio:
LONG Ke-jun(1974-), male, lecturer, doctoral student, 86-21-65988372, lonkj@sohu.com
Received Date: 2004-10-12
Publish Date: 2005-03-25

Abstract

Abstract

The distance of ramps is the key for designning road route, it has a big effect on the mainline traffic flow of urban expressway. According to the ramps features of urban expressway, the driving at the ramps of urban expressway was simulated with drivers behavior theory. In order to determine the minimum distance of ramps the lane lengthes for acceleration and deceleration were calculated under different ramp structures, and the calculating formulas were given. The model for determining the minimum distance of ramps was developed. An example shows that when the distance of ramps is less than the minimum distance, the vehicle's speed will be cut down, the service level of ramps will be reduced.
- traffic planning,
- ramp distance,
- driving behavior analysis,
- ramp combination mode,
- lane change

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References(9)

References

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