HighlightsSafety performance of two proposed service interchange designs were reviewed.The DDI and the new Milwaukee B were introduced as the safest interchange in terms of conflict frequency.The new synchronized had the best performance from the viewpoint of severity of the conflicts.Synchronized and DDI can be considered as the safe alternatives for failing diamond interchanges.

    AbstractInterchanges have high crash rates and large impacts on traffic operations. The main objective of this research is to analyze the safety performance of two new interchanges, the synchronized interchange and the Milwaukee B interchange. The primary method of study was microscopic simulation modeling using the Surrogate Safety Assessment Model (SSAM) program to estimate the quantity and type of conflicting interactions in each interchange. A comprehensive series of simulation scenarios were considered to include different conditions of traffic volumes, traffic turning ratios, traffic distribution, and heavy vehicles percentages. Afterward, outcomes were analyzed with two-way Analyses of Variance (ANOVAs) to compare the mean values of conflicts. Based on the results, the diverging diamond interchange (DDI) and Milwaukee B were the safest designs regarding observed conflicting interactions in the simulation models; however, the DDI did not seem as reliable from the viewpoint of wrong way movements. The new synchronized interchange, the parclo B, and the Milwaukee A (an existing interchange in Milwaukee, WI) showed the same rate of conflicts. The synchronized interchange may be advantageous because it was estimated to reduce the severity of crashes due to fewer crossing conflicts, a lower speed of conflicts, and a higher time to collision. The conventional diamond was the most dangerous design based on our measures. The DDI and the synchronized interchange look like plausible substitutes for reconstructing an unsafe diamond interchange due to the similarities in their required space.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Safety analysis of the new synchronized and milwaukee B interchanges in comparison to existing designs


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2017-09-30


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Simulation Modeling of Pedestrian Performance in the New Synchronized and Milwaukee B Interchanges versus Existing Designs

    Mehrara Molan, Amirarsalan / Hummer, Joseph E. | Transportation Research Record | 2018


    Safety Analysis of Interchanges

    Torbic, Darren J. | Online Contents | 2009


    Safety Analysis of Interchanges

    Torbic, Darren J. / Harwood, Douglas W. / Gilmore, David K. et al. | Transportation Research Record | 2009


    Safety Analysis of Freeway Interchanges

    He, Y. / Sun, X. / Coakley, R.C. et al. | British Library Conference Proceedings | 2008