The concept of design consistency evaluation provides highway designers with a proactive tool for roadway safety improvement. Previous research has focused on the development of evaluation models for basic highway segments, while little research has considered interchange ramps. Interchange ramps differ from major roadways in the complexity of vehicles' acceleration and deceleration activities on them. The objective of this paper is to develop a practical consistency evaluation method for interchange alignments based on the theory of operating speed. To begin with, by giving a profound analysis of the moving characteristic of vehicles on ramps, the speed-change process on ramps is divided into five phases. Next, operating speed along highway ramps and speed differential between successive elements of ramps are calculated based on regression models developed by previous research. Three criterions are then established to evaluate the design consistency of ramp alignments. Lastly, a real life example is presented to illustrate the proposed method.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Consistency Evaluation of Interchange Alignments


    Contributors:
    Tu, Shengwen (author) / Guo, Xiucheng (author) / Johnston, Peter (author) / He, Jianming (author) / Tu, Shengwu (author)

    Conference:

    First International Symposium on Transportation and Development Innovative Best Practices ; 2008 ; Beijing, China



    Publication date :

    2008-04-04




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Consistency Evaluation of Interchange Alignments

    Tu, S. / Guo, X. / Johnston, P. et al. | British Library Conference Proceedings | 2008


    Study of Alternative Interchange Horizontal Alignments Optimizing Model Based on Genetic Algorithm

    Shang, Y.-L. / Li, X.-G. / Yan, X.-Y. et al. | British Library Conference Proceedings | 2010



    A Knowledge-Based GIS Approach to the Evaluation of Design Consistency of Horizontal Alignments

    Faghri, Ardeshir / Harbeson, Mark | Transportation Research Record | 1999


    Meaningful Alignments

    Desolneux, A. / Moisan, L. / Morel, J.-M. | British Library Online Contents | 2000