Siemens’ Plus+ simplifies signalised intersection wiring

The latest innovation from Siemens comes under the Plus+ banner and encompasses its third generation digitised traffic control system which features distributed intelligence and simplifies cabling. In place of up to 300 wire cores on a single signalised intersection, the Plus+ system uses just four cables arranged in a system of rings, arms and spurs. The four wires, two power (48V) and two data, are used to connect ‘intelligent nodes’ in each traffic light head to be connected to the central controller, re
June 2, 2017 Read time: 2 mins
The latest innovation from 189 Siemens comes under the Plus+ banner and encompasses its third generation digitised traffic control system which features distributed intelligence and simplifies cabling.


In place of up to 300 wire cores on a single signalised intersection, the Plus+ system uses just four cables arranged in a system of rings, arms and spurs. The four wires, two power (48V) and two data, are used to connect ‘intelligent nodes’ in each traffic light head to be connected to the central controller, retaining functionality while minimising wiring and greatly simplifying installation.

Beyond reducing the ducting requirements to a single duct for each run, the ring configuration means that if a cable is severed the power and data can flow the ‘other way’ round the ring to reach the controller and therefore minimise or eliminate outages.  And if a traffic light pole is knocked over, the head(s) it carries will be automatically isolated, allowing the remaining lights to function as normal.

Cost reductions of up to 20% are possible and many existing sensors (loops, push button and so on) can be connected to the system.

The company is already working on pre-wiring traffic light heads in order that electrical installation at the roadside is reduced to connecting only four wires.

Urban Traffic Control

For more information on companies in this article

Related Content

  • Idris paves the way for loop based speed enforcement
    February 1, 2012
    With the Idris system now validated as a speed verification tool, the way is open for loops to be used in more complex enforcement applications. Diamond Consulting Services (DCS), developer of the Idris inductive loop-based vehicle detection and classification system, has recently successfully conducted validation trials which, the company says, open the way for Idris to be used for speed verification and loop-based sensors to be used for more complex applications such as speed-on-green and differential spe
    Read More
  • Inertial sensors dramatically improve GNSS for ITS applications
    January 18, 2012
    Phil Harris, Thales UK, on how fused sensor data can significantly enhance GNSS-based positioning systems' performance in urban areas. Global Navigation Satellite System (GNSS)-based positioning is unique among available positioning technology due to its universal coverage and low equipment cost. By measuring the distances between an unknown position (such as a vehicle), and at least three known positions (GPS satellites), the unknown position can be calculated in three dimensions (latitude, longitude, and
    Read More
  • Time for a rethink on road user charging
    February 1, 2012
    There is no value in further US VMT charging trials, except to delay the inevitable. These trials should end after completion of the University of Iowa's National Evaluation of a Mileage-based Road User Charge. There is far greater promise in unleashing private operators to commence profitable, non-tolling services, then using these for toll assessment and collection as fuel distributors are currently used to collect fuel taxation. Bern Grush writes
    Read More
  • SRL shows green for highway workzone stop and go
    June 5, 2023
    Company launches Rosgo as well as enhancing Urban64 traffic control system
    Read More

Highlighted Content