Vehicle Class–Specific Route Guidance of Freeway Traffic by Model-Predictive Control

Integrated traffic control for mixed urban and freeway networks: A model predictive control approach

We develop a control method for networks containing both urban roads and freeways. These two road types are closely connected: congestion on the freeway often causes spill-back leading to urban queues, slowing down the urban traffic, and vice versa. As a consequence, control measures taken in one of the two areas can have a significant influence on the other area. We first develop a model that ...

Model Predictive Control of Urban Networks with Perimeter Control and Route Guidance

Recent studies on empirical data demonstrated the existence of macroscopic fundamental diagram (MFD), which expresses an aggregated model of traffic dynamics linking accumulation and output flow of an urban region. Employing MFD in modeling of urban networks opens up possibilities to introduce a new generation of real-time traffic control structures and improve mobility. Although there are stud...

Freeway Control Using a Dynamic Traffic Flow Model and Vehicle Reidentification Techniques

Freeway traffic flow is described in terms of control theory. The detecting elements of millimeter-wave radar sensors, which detect speed and occupancy time by a 61-GHz continuous-wave doppler radar, are used. The regulating unit consists of variable traffic signs for traffic-dependent speed limit and alternative route guidance. The control unit consists of a local computer and a control center...

Freeway Traffic Management and Control

Model Predictive Control of a Freeway Network with Capacity Drops

In this paper, we present a model predictive controller to reduce road traffic congestion in freeway networks. The model predictive controller regulates traffic in the freeway through the use of ramp metering and variable speed limits. The controller uses a Link-Node Cell transmission model (LN-CTM) to represent freeway dynamics. We modify the standard LN-CTM to account for the capacity drop ph...