Plus+ traffic control system

A completely new approach to traffic signal control. Intelligent infrastructure improves resilience. Minimal cabling simplifies installation and cuts cost.

With financial and people limitations and increasing pressure on our congested road infrastructure, it’s no surprise to know that on-street engineering time is a major challenge for those responsible for traffic management.  Plus+ provides a complete traffic signal solution suitable for intersections and pedestrian crossing sites in both a standard and small cabinet.

Resilience by design

Based on the proven ST950 Intersection controller, the ST950 Plus+ system from Yunex Traffic no longer uses many individual connections between signal heads and controllers; instead, it uses simple four core cables and intelligent communications to reduce the installation effort, as well as saving valuable resources.

By transferring to our Plus+ system from a traditional approach, the reduction in copper alone is astounding.

ST950 Plus+ and the dedicated failsafe components have been designed to be highly resilient to internal failure and external damage.  If damage does occur to the traffic signals, individual nodes can be 'hot-swapped' typically allowing maintenance to be undertaken while the traffic signals remain switched on.

Combined with a design which is able to withstand short circuits that may occur during damage to in-street cables and redundant power supplies, Plus+ can make sure the intersection is kept available and operational during repairs or predictive maintenance.

First commission of Plus+ in Coventry

On June 24th 2020, we successfully commissioned the first Plus+ installation in Coventry. The installation marks a major milestone for this ground-breaking traffic signal technology and we are delighted to see this intelligent infrastructure solution in full operation, delivering benefits to Coventry City Council, its traffic management team and of course, the city's road users.

  • Resilient by design
  • Cable methodology
  • Dedicated components
  • Designing for Plus+
  • Detection
  • Installation features

Resilient by design

ST950 Plus+ and the dedicated failsafe components have been designed to be highly resilient to internal failure and external damage.  If damage does occur to the traffic signals, individual nodes can be 'hot-swapped' typically allowing maintenance to be undertaken while the traffic signals remain switched on.

Combined with a design which is able to withstand short circuits that may occur during damage to -in-street cables and redundant power supplies, Plus+ can make sure the intersection is kept available and operational during repairs or predictive maintenance.

Cable methodology

Traditional traffic control systems use many cables to connect street furniture to the traffic controller.  A distributed system uses intelligence spread throughout the intersection to significantly reduce individual cable connections using a combination of Arm and Ring cabling meaning that:.

  • fewer, lighter cables are needed
  • the cabling approach makes use of low-level access poles much easier
  • cabling approach makes pre-assembly of poles and heads more efficient.

All of these factors mean that there is a significant reduction in on-street working time, meaning a quicker and safer installation.

Dedicated components

Plus+ offers several new components which facilitate the use of advanced system communication and reduced cable, including:

These retain the 'look and feel' of their standard ELV family members but include the necessary internal technology to support Plus+ operation.

Designing for Plus+

Yunex Traffic Plus+ offers a powerful toolset to support and simplify the design, installation, commissioning and maintenance processes.

To help simplify the design process, a free to download AutoCAD plug-in works alongside the widely used KeySignals site layout drawing tools to capture the full information about a junction's characteristics and component relationships.  By calculating the full parameters for rings and arms (and identifying cable runs and node assignments are within design limits), the design process is made as efficient as possible.   

Detection

Plus+ is compatible with standard detection as per the ST950 ELV.

In addition to the standard components Plus+ introduces a new concept in loop detector technology.  The Plus+ SmartLoop places detection technology close to the actual detection oops and allows them to connect into the Plus+ communication and power network around the site, eliminating the need to loop feeder cables to be brought back to the controller cabinet further adding to the cable savings.

Installation features

The distributed intelligence and flexible cable methodologies open up new opportunities to further reduce overall scheme implementation costs.

Micro-ducting is a method of installing a smaller diameter duct into a carriageway slot, reducing the need for civils works in situations where road closures or road works would cause disruption to the strategic road network. 

Using Plus+ in a temporary installation as part of a signal modernisation scheme provides a fully-compliant TOPAS 2500 controller with all of the associated features, detection and connectivity removing the need for a secondary temporary system.  Due to the architecture of the Plus+ system, as the site works are completed the Plus+ signals can be transferred one at a time into their permanent location whilst the site remains operational.

Let us help you improve your traffic network

Developed by Yunex Traffic to deliver on-street resilience and reliability, as well as fast and cost effective installation for both new and refurbished projects, Plus+ can reduce overall installation and maintenance costs and increase intersection availability. By drastically reducing the raw materials, cabling and people resource required compared to traditional systems, Plus+ is an environmentally friendly solution that minimises installation time, thereby improving site safety and reducing disruption.