Impacts of the Coordination of DTMs with Different Local Control Objectives Considering Their Spatial Layout

With the steadily increasing road traffic demand, congestion on freeways has become a major problem. With the development of communication technology and automated vehicles, there are more opportunities for DTMs to be studied extensively at the coordination level and cooperation level. In the existing literature, the coordination of RM (ramp...

Reduction of Capacity Drop at Sag and Tunnel Bottlenecks through Connected Vehicles

Traffic congestion is a challenge that frequently emerges due to changes in the roadways such as tunnels and sags, causing capacity reduction. The capacity drop phenomenon exacerbates traffic congestion, due to decreased queue discharge rates. Among the strategies employed for traffic management, Variable Speed Limit (VSL) control is a common...

Integrated Approach to Variable Speed Limits and Ramp Metering

Traffic congestion continues to remain a serious problem in most countries, with significant economic and environmental losses. ‘Intelligent Transport Systems (ITS)’ that utilize advanced information and communication technology for managing road infrastructure, including vehicles and users, have shown great potential in dealing with this...

Driving behavior in mixed traffic in combination with variable speed limit

New applications of connectivity between vehicles and the infrastructure are developed. One of these applications is providing upstream information on variable speed limits to connected and automated vehicles. It is expected that the connectivity can contribute to safer roads due to better compliance to the posted speed limits. Those...

An Assessment Framework for the Speed Policy on Dutch Motorways

Today the Dutch cabinet provides in implementing a maximum speed limit of 130 km/h on Dutch motorways as much as possible. As a consequence, research is needed to the circumstances where and when higher speed limits (or maybe a dynamic speed limit) will be acceptable. In other words, what speed limit is the most optimal for a road section taking...

Optimising the throughput for an integrated urban-freeway network: Design of an MPC controller using variable speed limits and intersection control

In this MSc Thesis project, a Model Predictive Controller (MPC controller) using variable speed limits and intersection control was designed and subsequently evaluated. The design was based on combining existing control algorithms for urban and freeway networks, integrating them. While this MPC controller improved upon throughput more than MPC...

Freeway Traffic Control - An adaptive control approach towards easy-to-implement Variable Speed Limit algorithms

Nowadays, the high demand for road transportation often reaches a point where it exceeds the capacity of freeway traffic networks, resulting in congestion. Freeway traffic congestion is a major social problem, as it is the reason for increased time delays, higher accident risk and environmental pollution. There is, therefore, the need for a...