Smooth-flowing junctions and fewer jams: TRL has the answer

TRL Software launches ‘Junctions 10’; marking the latest and most notable upgrade to the industry-standard modelling package to date.

It builds on more than three decades of research and development, as part of a suite of tools to model and predict capacity, queues and delays.

A key part of the government’s goal to reduce queues and jams to enable free-flowing traffic, it is an important component in the Government’s aim to reduce carbon emissions and improve journeys with junction improvements.

‘Junctions 10’, incorporates the largest changes to date in its industry-standard package for modelling roundabouts, priority junctions and simple signalised junctions.

It has been developed around the latest evolving industry trends and offers the most complete modelling capabilities on the market today.

Driven primarily by the goal of eliminating as many gaps in previous ‘Junctions’ core modelling capabilities as possible, ‘Junctions 10’ addresses three areas: modelling, usability and collaboration. Updates include the addition of specific modelling scenarios such as entry/exit only approaches at roundabouts and priority junctions, alongside traffic-calming measures such as chicanes.

Addressing usability, the TRL Software team has revamped its product to provide a more intuitive look and feel. The purchasing of the product has also been simplified through the launch of follow-me licensing where access follows users seamlessly as they move from one device to another.

Subu Kamal, Head of Product Management at TRL Software, explains: “User requirements have been analysed over a long period of time, focusing on how people’s working habits are changing. This has enabled us to develop a new package that features several innovative enhancements and a simplified user process. Analysis has never been so quick and easy.”

Alongside these updates, Junctions 10 is built on a new cloud-based Collaboration Portal, which acts as a personal storage area and offers the ability to share files both internally and externally. This ‘open access’ design enables multiple teams across numerous locations to work together on a project.

Mike Guerin, Head of Sales for TRL Software, adds: “The level of investment that has gone into this latest version of Junctions is significant. All new capabilities were tested to ensure they meet or exceed users’ needs and align with their processes. Designed in collaboration with our Technical Review Programme, we want this partnership to continue and invite users to contribute actively to our Ideas Portal to inform future developments.”

‘Junctions’ has been a core product for TRL Software for over 30 years and is based around three core modules: ARCADY (for the assessment of roundabouts), PICADY (for isolated priority junctions) and OSCADY (for isolated signal-controlled junctions). Older iterations of the software have separated these three modules, with Version 9.5 the first to bring them together into one solution – a move that is continued in Version 10.

To find out more about Junctions, please visit:

About TRL Software

TRL Software is a division of TRL, a global centre for innovation in transport and mobility. TRL provides world-leading research, technology and software solutions for surface transport modes and related markets engaged in intelligent, new mobility innovations.

Independent from government, industry and academia, TRL helps organisations create global transport systems that are safe, clean, affordable, liveable and efficient.

Established in 1933 within the British Government as the UK’s Transport Research Laboratory, TRL was subsequently privatised in 1996. Today, TRL has more than 1,000 clients across 145 countries, driving positive societal and economic benefit worldwide.

Core areas of expertise include infrastructure asset management & asset technologies; intelligent transport systems & traffic operations; sustainability & healthy mobility; vehicle safety engineering & technology research; major incident investigations; human factors safety & behavioural science.

TRL is strategically investing, producing disruptive research and delivering innovation linked to:

  • Connected & self-driving vehicles
  • Ultra-low emission technologies
  • Shared mobility services
  • Intelligent asset information
  • Big data, machine learning & artificial intelligence.

Headquartered in the UK, nearly one-third of TRL’s business is with overseas organisations. Its international focus covers Europe, India, Africa & Middle East, plus wider Commonwealth countries, supported by strategic collaborations in North America and Asia Pacific.

More information can be found at

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