document

Relationships between mobile phone usage and activity-travel behavior: A review of the literature and an example

Wang, Y. (author), Correia, Gonçalo (author), van Arem, B. (author)

Almost everyone has a mobile phone today. In addition to calls and text messages, people are utilizing mobile apps and websites to connect to the world and explore different content anytime and anywhere. The use of smart phones generates billions of records, including spatiotemporal trajectories, and various mobile phone usage details, such as...

book chapter 2019

document

Modelling Driver Assitance Systems by Optimal Control

Wang, M. (author), Daamen, W. (author), Hoogendoorn, S.P. (author), van Arem, B. (author)

Driver assistance systems support drivers in operating vehicles in a safe, comfortable and efficient way, and thus may induce changes in traffic flow characteristics. This paper put forward a receding horizon control framework to model driver assistance systems. The accelerations of automated vehicles are determined to optimise a cost function,...

conference paper 2012

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Comparative assessment of safety indicators for vehicle trajectories on the highway

Mullakkal-Babu, F.A. (author), Wang, M. (author), Farah, H. (author), van Arem, B. (author), Happee, R. (author)

Safety measurement and analysis have been a challenging and well-researched topic in transportation. Conventionally, surrogate safety measures have been used as safety indicators in simulation models for safety assessment, in control formulations for driver assistance systems, and in data analysis of naturalistic driving studies. However,...

conference paper 2017

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Optimal lane change times and accelerations of autonomous and connected vehicles

Wang, M. (author), Hoogendoorn, S.P. (author), Daamen, W. (author), van Arem, B. (author), Happee, R. (author)

This contribution puts forward a flexible approach to model the decision-making or design controller for automated driving systems, where tactical-level lane change decisions and control-level accelerations are jointly evaluated based on iteratively solving an online optimization problem. The key idea is that automated vehicles determine lane...

conference paper 2016

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Design and analysis of full range adaptive cruise control with integrated collision a voidance strategy

Mullakkal-Babu, F.A. (author), Wang, M. (author), van Arem, B. (author), Happee, R. (author)

Current Full Range Adaptive Cruise Control (FRACC) systems switch between separate adaptive cruise control and collision avoidance systems. This can lead to jerky responses and discomfort during the transition between the two control modes. We propose a Full Range Adaptive Cruise Control (FRACC) design integrating adaptive cruise control and...

conference paper 2016

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Submicroscopic framework to model mixed highway traffic

Mullakkal-Babu, F.A. (author), Wang, M. (author), van Arem, B. (author), Happee, R. (author)

conference paper 2018

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Optimization of Traffic Efficiency at On-ramps with Connected Automated Vehicles

Chen, N. (author), van Arem, B. (author), Wang, M. (author)

This paper aims to optimize on-ramp merging processes for connected automated vehicles by utilizing an existing hierarchical control architecture including a decision-maker and an operational controller. The decision-maker employs surrogate linear models to predict future vehicular acceleration analytically and computes a merging sequence to...

conference paper 2020

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String Stability of Heterogeneous Platoons with Non-connected Automated Vehicles

Wang, M. (author), Li, Honghai (author), GAO, Jian (author), Huang, Zichao (author), li, Bin (author), van Arem, B. (author)

It is expected that automated vehicles will gradually penetrate on public roads, resulting in mixed traffic in the next decades. This can impact traffic flow operations, especially the roadway capacity and flow stability. It is of paramount<br/>importance to understand and predict the implications of automated driving systems on traffic flow at...

conference paper 2017

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A Flexible Strategy for Efficient Merging Maneuvers of Connected Automated Vehicles

Chen, N. (author), Wang, M. (author), Alkim, Tom (author), van Arem, B. (author)

Merging is a challenging task for automated vehicles. This paper proposes a strategy for connected automated vehicles (CAVs) to guide merging on-ramp vehicles efficiently while ensuring safe interactions with the mainline vehicles. Point-mass kinematic models are used to describe 2-D vehicle motion and receding horizon control is used to...

conference paper 2018

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Hierarchical Optimal Maneuver Planning and Trajectory Control at On-Ramps With Multiple Mainstream Lanes

Chen, N. (author), van Arem, B. (author), Wang, M. (author)

Connected Automated Vehicles (CAVs) have the potential to improve traffic operations when they cooperatively maneuver in merging sections. State-of-the-art approaches in cooperative merging either build on heuristics solutions or prohibit mainline CAVs to change lane on multilane highways. This paper proposes a hierarchical cooperative...

journal article 2022

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Traffic Flow Impacts of Converting an HOV Lane Into a Dedicated CACC Lane on a Freeway Corridor

Xiao, L. (author), Wang, M. (author), van Arem, B. (author)

Cooperative Adaptive Cruise Control (CACC) systems can increase roadway capacity, but the benefits are marginal at low market penetration rates (MPRs). Thus, a CACC dedicated lane is considered to group CACC vehicles for efficient traffic stream. Concepts of converting existing High Occupancy Vehicle (HOV) lanes into CACC lanes emerge, which...

journal article 2020

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Delay-compensating strategy to enhance string stability of adaptive cruise controlled vehicles

Wang, M. (author), Hoogendoorn, S.P. (author), Daamen, W. (author), van Arem, B. (author), Shyrokau, B. (author), Happee, R. (author)

A novel strategy to enhance string stability of autonomous vehicles with sensor delay and actuator lag is proposed based on a model predictive control framework. To compensate sensor delay, the approach entails estimating the (unknown) system state at the current time using the system state in a previous time, the applied control history and a...

journal article 2016

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Comparative Safety Assessment of Automated Driving Strategies at Highway Merges in Mixed Traffic

Mullakkal-Babu, F.A. (author), Wang, M. (author), van Arem, B. (author), Happee, R. (author)

We present a simulation-based approach to assess the safety impacts of vehicles equipped with Automated Driving Systems (ADS) in mixed traffic with Human-driven Vehicles (HV). Specifically, we compare two generic longitudinal strategies of ADS to handle a cut-in: Reactive ADS acting only when the cut-in vehicle crosses the target lane boundary,...

journal article 2020

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Unravelling effects of cooperative adaptive cruise control deactivation on traffic flow characteristics at merging bottlenecks

Xiao, L. (author), Wang, M. (author), Schakel, W.J. (author), van Arem, B. (author)

Cooperative Adaptive Cruise Control (CACC) systems have the potential to increase roadway capacity and mitigate traffic congestion thanks to the short following distance enabled by inter-vehicle communication. However, due to limitations in acceleration and deceleration capabilities of CACC systems, deactivation and switch to ACC or human...

journal article 2018

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Characterizing Behavioral Differences of Autonomous Vehicles and Human-Driven Vehicles at Signalized Intersections Based on Waymo Open Dataset

Wang, Y. (author), Farah, H. (author), Yu, Rongjie (author), Qiu, Shuhan (author), van Arem, B. (author)

Autonomous vehicles (AVs) are being introduced to the traffic system with the promise of improving current traffic status. However, the empirical data also indicate contrary effects with estimated higher crash rate and change of crash patterns. Therefore, it is necessary to investigate the driving behavior of AVs and human-driven vehicles ...

journal article 2023

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A Robust Longitudinal Control Strategy of Platoons under Model Uncertainties and Time Delays

Chen, N. (author), Wang, M. (author), Alkim, Tom (author), van Arem, B. (author)

Automated vehicles are designed to free drivers from driving tasks and are expected to improve traffic safety and efficiency when connected via vehicle-to-vehicle communication, that is, connected automated vehicles (CAVs). The time delays and model uncertainties in vehicle control systems pose challenges for automated driving in real world....

journal article 2018

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A flock-like two-dimensional cooperative vehicle formation model based on potential functions

Hao, R. (author), Liu, M. (author), Ma, Wanjing (author), van Arem, B. (author), Wang, M. (author)

Due to the manoeuvre complexity, models describing the platoon formation process on urban roads are lacking in the literature. Inspired by flocking behaviours in nature, we proposed a two-dimensional model to describe connected automated vehicle (CAV) group dynamics based on the potential theory, which is composed of the elastic potential...

journal article 2022

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Connected variable speed limits control and car-following control with vehicle-infrastructure communication to resolve stop-and-go waves

Wang, M. (author), Daamen, W. (author), Hoogendoorn, S.P. (author), van Arem, B. (author)

The vision of intelligent vehicles traveling in road networks has prompted numerous concepts to control future traffic flow, one of which is the in-vehicle actuation of traffic control commands. The key of this concept is using intelligent vehicles as actuators for traffic control systems. Under this concept, we design and test a control...

journal article 2016

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Understanding travellers’ preferences for different types of trip destination based on mobile internet usage data

Wang, Y. (author), Correia, Gonçalo (author), van Arem, B. (author), Timmermans, H. J.P.(Harry) (author)

New mobility data sources like mobile phone traces have been shown to reveal individuals’ movements in space and time. However, socioeconomic attributes of travellers are missing in those data. Consequently, it is not possible to partition the population and have an in-depth understanding of the socio-demographic factors influencing travel...

journal article 2018

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A Hybrid Submicroscopic-Microscopic Traffic Flow Simulation Framework

Mullakkal-Babu, F.A. (author), Wang, M. (author), van Arem, B. (author), Shyrokau, B. (author), Happee, R. (author)

Current lane-based microscopic traffic simulators combine car-following and lane changing logic to describe the (often discrete) lateral vehicle motion on multi-lane road segments. However, the simulated lateral trajectories are physically unplausible and inside-lane behavior such as lane-keeping and curve negotiation cannot be modelled. In this...

journal article 2021