Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Congested conditions"”.
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Freeway speed-flow relationships under rain and congested conditions
A procedure to account for the impact of rain and congested conditions on the average speed estimates is provided in this study. Although the Highway Capacity Manual (HCM) provides some discussion on the impact of adverse weather on speed-flow relationships, these impacts are not quantified. Using …
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A System for Travel Time Estimation on Urban Freeways
… to reach their destinations, particularly under congested conditions. Though many advances have been made in the field of traffic engineering and ITS applications, there is a lack of practical travel time estimation procedures for ATIS applications. Automatic Vehicle Identification (AVI) and …
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WZ-speed harmonizer: an optimized active traffic and demand management system with speed harmonization for work zones
… models are not generally sufficient to describe congested conditions. Thus this study included the piecewise models as constraints to enhance accuracy of traffic state prediction in congested conditions. A continuous transformation approach was proposed to eliminate relevant integer variables. …
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Estimating the true extent of air traffic delays
… from origin to destination under optimal (non-congested) conditions. We choose the fifteenth percentile of reported statistics on gate-to-gate time as an estimator of the baseline. We then compute baseline times for 618 major O-D pairs. Using the baseline times, we compute "true delays" on …
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A new approach to estimate congestion impacts for highway evaluation: effects on fuel consumption and vehicle emissions
… prediction of vehicles operating on highways in congested conditions. The patterns of fuel consumption and emissions are showing the appropriate changes in relation to traffic congestion, and therefore further calibration is required. Furthermore, the model framework readily lends itself to …
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Formulations, Issues and Comparison of Car-Following Models
… car-following behavior encompassing steady-state conditions and two constraints — acceleration and collision avoidance — is presented. Specifically, the variable power vehicle dynamics model proposed by Rakha and Lucic (2002) is utilized for the acceleration constraint. Subsequently, the thesis …
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The determinants of modal choice of urban travel: a case study
… than to take public transit, even under already congested conditions. Only very large cities have the capacity to exploit development of underground systems to relieve the problem. For example, Montreal devotes a large portion of underground space to subways. However, medium-sized cities are …