Year: 2026

Following the same theory previously presented at the JCT Symposium on the RARR (Route Analysis Recommendation Report) process, this presentation/paper investigates the use of traffic signal technology and targeted timing adjustments to improve journey times and reliability for prison vehicle movements between courts and custodial establishments. Using detailed route and…

Many of the signalised junctions and roundabouts on the strategic road network (and others) have queue detection at the bottom of the off slips at say 160m from the stopline. At MOVA sites on short internal links the X loop may also be used to provide a queue detect/hurry call.…

Traffic flow can be modelled at a macroscopic level using the same equations as are used to model the flow of fluids, compressible or incompressible. The mathematical model (dating from 1955) introduced by Lighthill-Whitham-Richards is formulated as a nonlinear partial differential equation derived by the conservation of vehicles in a…

This paper presents a live evaluation of incident detection within SCOOT® 8AI in Manchester. The work forms part of an ongoing collaboration between Transport for Greater Manchester (TfGM) and TRL Software – and addresses a difficult practical problem:how can an incident detection be evaluated when there is no complete incident…

Using the Council’s Pre-Emptive Traffic Management System (PTMS) which collects speed data from approximately 30,000 links in Derbyshire, a Journey Monitoring Tool has been developed.  This uses stored speed data to establish delays on each selected link (see later).   The data fed into the PTMS is derived from floating vehicle…

For many years, innovation within traffic signal engineering has focused primarily on controllers, communications systems, detectors, and signal equipment. Whilst these technologies continue to evolve, many asset failures originate not from the equipment itself, but from the infrastructure and electrical connections supporting it. This paper proposes that modern traffic signal…

Detection provides an essential source of traffic information to signal controllers. Historically inductive loops and the early above ground detectors all delivered a single output corresponding to a single detection zone. Traffic control algorithms were developed against this constraint.New technologies can simultaneously monitor multiple areas or objects of interest and…

This paper gives some simple examples to illustrate the capacity-maximising property of traffic signal control policy P0 and shows that this capacity-maximising property is not possessed by all responsive signal control policies. The paper also illustrates how an equilibrium consistent with traffic signal control policy P0 may be enhanced by…

The Midland Metro Alliance (MMA) has delivered several major tramway extensions across the West Midlands, including the Birmingham Westside, Birmingham Eastside, Wolverhampton City Centre and Wednesbury to Brierley Hill extensions. These projects support regional connectivity, regeneration and sustainable transport objectives. This paper examines the development of the traffic signal strategy…

Derbyshire, located in the centre of England, has an extremely varied topography, especially in the Peak District National Park. There are no cities in Derbyshire, with the largest town being Chesterfield. However, several important highway routescross the County, including the M1, the A6 and A57. Connected Roadworks.  Using Derbyshire County…