Sökning: "free-flow speed"

Hittade 3 avhandlingar innehållade orden free-flow speed.

  1. 1. Advancing Traffic Safety An evaluation of speed limits, vehicle-bicycle interactions, and I2V systems

    Detta är en avhandling från Stockholm : KTH

    Författare :Ary Pezo Silvano; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Traffic safety; urban roads; posted speed limits; road characteristics; free-flow speed; time headway; vehicle-bicycle interactions; logit model; yielding probability; cooperative systems and warning messages.; Transportvetenskap; Transport Science;

    Sammanfattning : Since the introduction of motor vehicles, the number of fatalities and accidents has been a concern for society.The number of fatalities on roads is amongst the most common causes of mortality worldwide (WHO, 2015).Even in industrialized countries the number of fatalities remains unacceptable. LÄS MER

  2. 2. Hierarchical Modeling of Road Traffic Networks

    Detta är en avhandling från Stockholm : Mark och vatten

    Författare :Eugene Merritt; KTH.; [2003]
    Nyckelord :traffic simulation models; calibration and validation; field data collection;

    Sammanfattning : The main objective of the thesis was to develop and applymethodologies for analysis and evaluation of the applicabilityof different types of road traffic simulation models for urbantraffic conditions. For this purpose a number of models ofmacroscopic, mesoscopic and microscopic type were applied,calibrated, validated and analyzed using extensive field datacollection to obtain traffic flow, travel time and queue-lengthdata for major road networks in Stockholm and Uppsala. LÄS MER

  3. 3. A methodology for operations-based safety appraisal of two-lane rural highways Application in Uganda

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Godfrey Mwesige; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; passing zones; passing rate; collision risk; accepted gap; time-to-collision; passing sight distance; two-lane rural highways; Uganda; Transportvetenskap; Transport Science;

    Sammanfattning : The majority of the road infrastructure in developing countries consists oftwo-lane highways with one lane in each travel direction. Operational efficiency of these highways is derived fromintermittent passing zones where fast vehicles are permitted by design to pass slow vehicles using the opposite traffic lane. LÄS MER