In most traffic projects, speed survey is required. If the speed survey uses detector, all data might be obtained. Otherwise a sampling strategy needs to be introduced. To ensure the collection of representative sample of speeds there were several sampling options, e.g. collecting sample every regular interval. In this paper three regular intervals were tested, i.e. 30 seconds, 1 minute and 2 minutes 30 seconds. Travel time data was collected in morning, mid day, and afternoon periods in a two-lanes two-ways underpass in Jakarta. Travel speeds were calculated by dividing light vehicle travel times with the underpass length. Space mean speeds were calculated as a light vehicle travel mean speeds/ 5 minutes. The observation of each light vehicle travel times (to get each light vehicle travel speeds) was conducted for the first 15 minutes of three observation periods. More frequent speed sample collection provides higher accuracy.Keywords: space mean speed, sampling strategy, regular interval sampling


    Access

    Download


    Export, share and cite



    Title :

    SAMPLING STRATEGY FOR SPACE MEAN SPEED SURVEY


    Contributors:

    Publication date :

    2014-07-15


    Remarks:

    doi:10.26593/jt.v12i3.501.%p
    Jurnal Transportasi; Vol 12, No 3 (2012) ; 26151146 ; 14112442



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    DDC:    629



    Modeling time mean speed and space mean speed for heterogeneous traffic conditions

    Seetharaman, Padma / Errampalli, Madhu / Senathipati, Velmurugan et al. | Taylor & Francis Verlag | 2011




    Prediction Models for Space Mean Speed on Urban Roads

    Zedda, Mariangela / Pinna, Francesco | Springer Verlag | 2017


    SAMPLING RATES FOR TRAVEL SPEED SURVEY WITH CAR NAVIGATION SYSTEM

    Ishida, H. / ITS Congress Association | British Library Conference Proceedings | 2000