Ramp Metering with Real-Time Estimation of Parameters

Demand exceeding the capacity of a bottleneck will create congestion upstream of that bottleneck. Once this congestion occurs, the maximum flow through this bottleneck decreases (capacity drop). By limiting the flow towards the bottleneck, one can prevent or postpone the capacity drop and the accompanying congestion. In case the bottleneck is...

Strategy-Based Driving Behaviour on Freeways: Findings of Test-Drive and On-Line Survey Study

Freeways form an important part of the road network. Drivers’ behavior can be split in longitudinal (acceleration and deceleration) and lateral behavior (lane changing). The combination of these two behaviors on freeways play a key role in traffic operations. This paper tries to describe the driving behavior, emphasizing the relation between the...

Bounded acceleration capacity drop in a Lagrangian formulation of the kinematic wave model with vehicle characteristics and unconstrained overtaking

In this contribution a model-based analysis of the application of bounded acceleration in traffic flow is considered as a cause for the capacity drop. This is performed in a Lagrangian formulation of the kinematic wave model with general vehicle specific characteristics. Unconstrained overtaking is presumed, which allows a demonstration to be...

Stedelijk verkeersmanagement: Problemen van nu en richtingen voor de toekomst

Na een lange periode gekenmerkt door suburbanisatie staat de stad weer volop in de belangstelling. Het inwonertal neemt weer toe en vooral jongeren vestigen zich in de stad. Deze ontwikkeling heeft grote gevolgen voor de stedelijke mobiliteit. Welke rol moet en kan stedelijk verkeersmanagement spelen bij het faciliteren van de vraag naar...

Metering with traffic signal control: Development and evaluation of an algorithm

The effect of inaccurate traffic data for ramp metering: Comparing loop detectors and cameras using information utility

This paper introduces a topic which is of growing interest in the traffic control and management community, namely the relation between traffic data quality and the efficiency of traffic management. After some explanatory background and state of the art, it will become clear that no standard approach is available for traffic engineers to...

Introducing the Core Probability Framework and Discrete-Element Core Probability Model for efficient stochastic macroscopic modelling

In this contribution the Core Probability Framework (CPF) is introduced with the application of the Discrete-Element Core Probability Model (DE-CPM) as a new DNL for dynamic macroscopic modelling of stochastic traffic flow. The model is demonstrated for validation in a test case and for computational efficiency on two simple networks. The CPF...

The Impact of Loop Detector Distance and Floating Car Data Penetration Rate on Queue Tail Warning

There is a growing interest in the traffic community about the relation between traffic data quality and the efficiency of traffic management. Data collection is expensive and if the same level of traffic performance can be reached with less data or if traffic management becomes more efficient with better data, then that is interesting for a lot...

Core Probability Model : Efficient macroscopic sensitivity modelling: Conceptual design

Probability in traffic: A challenge for modelling

In the past decade an increase in research regarding stochasticity and probability in traffic modelling has occurred. The realisation has grown that simple presumptions and basic stochastic elements are insufficient to give accurate modelling results in many cases. This paper puts forward a strong argument for the further development and...

Verkeersmanagement in de toekomst

TrafficQuest (het Expertisecentrum Verkeersmanagement) is een samenwerkingsverband tussen Rijkswaterstaat DVS, TNO en de TU Delft, met als doel het bundelen, ontwikkelen en ontsluiten van kennis over verkeersmanagement. De afgelopen tijd heeft TrafficQuest kritisch nagedacht over de stand van zaken met betrekking tot verkeersmanagement en de...