Green on demand

Control adaptive traffic signals with Artificial Intelligence


Automatically regulate traffic lights in real-time to reduce congestion, cut down travel time, and improve public satisfaction

Why camera-based detectors? Get in touch



In a nutshell:

How Parquery's solution actuates traffic lights

What if traffic lights adjusted to actual conditions?


Most drivers have at least once been sitting tight, fuming at lights that unwaveringly remained red although the intersection was empty. Or crawling at a snail’s pace towards the junction, waiting for several full light cycles because the road is so congested.

Traffic lights can now be controlled demand-driven with cameras: these detect waiting vehicles and trigger the traffic lights. The technology behind this is Parquery's artificial intelligence (AI): it analyzes the video footage and automatically determines which traffic lights need to be red and which green to optimize traffic flow.


Why use Parquery’s virtual loops instead of conventional detection loops?


Control adaptive traffic signals with Artificial Intelligence
Parquery's traffic solution has no limit on the number of virtual loops


As many detectors as you need


In contrast to conventional detection loops, there is no limit to the number of virtual loops with Parquery’s innovative camera solution.

Use adaptive signal control on any intersection: small T-junctions, large roundabouts, and complicated multi-lane crossings with different road users.

Not just cars

Accomplish adaptive traffic signals for any road user, not just cars and trucks. Parquery’s powerful Artificial Intelligence (AI) algorithms work for any road user, whether a vehicle, tram, motorbike, e-scooter, bicycle, or pedestrian.

Thus, you can prioritize different user groups, e.g. direct trucks on certain routes, or encourage alternatives to the private car.

For example, implement a green wave for cyclists at the expense of car traffic. Seeing cyclists race ahead might lower the threshold for drivers to switch their car for a bike next time.

Parquery detects any vehicle, not just cars

Plain sailing


It’s as easy as putting up a CCTV surveillance system: Install a camera and create virtual loops where you need them in no time without traffic disruptions, scheduling heavy construction works, or scarring the street surface.

Use existing cameras or install new ones. Parquery’s solution can work with any camera, on-site or locally.

Parquery detects vehicles on images from any camera.

For all roads - also unpaved

Our solution adjusts to any road surface, paved and unpaved - whether tarmac, concrete, gravel, or a patchwork - no need to wait for the budget to redo the road first. Damaged pavement that is problematic for traditional detection loops, does not affect Parquery:

Parquery's traffic solution works on any road, even with ruts

Ruts (grooves worn into the street by the wheels of heavy vehicles).

Photo: Tomasz Sienicki

Parquery's traffic solution works on any road, even with ground subsidence

Ground subsidence or heaving (gradual caving in, sinking, or rising of land).

Photo: Dave Spicer

Parquery's traffic solution works on any road, even with pot-holes and patches

Crocodile cracking due to overloading, resulting in pot-holes and patches.

Photo: Editor5807

Parquery's traffic solution works on any road, even with patched-up road surfaces

Patched-up roads

Parquery's traffic solution works on any road, even with cobbled streets

Cobbled streets

What are induction loops?

Parquery's traffic solution replaces induction loops


Inductive loops are a conventional means to address variable traffic demand. They are wires embedded in the pavement that trigger the light upon measuring the change in the magnetic field when a large metal object (a car or truck) passes over. However, they proved unreliable, particularly for smaller vehicles and motorbikes, and fail often for user groups like pedestrians and cyclists.


For each induction loop, a trench has to be cut into the road surface. This requires civil works and stopping the traffic during construction. The damage inflicted to the pavement is a particular concern where temperatures drop below freezing in winter. Water can intrude into the road surface layer where it is cut, freeze and might break and deteriorate.

Induction loops damage road surfaces

Camera-based virtual loops offer a destruction-free alternative to conventional vehicle detection.

Pilot project: Dutch provice controls traffic lights with AI


Building on a successful project on camera-based incident detection on behalf of the province of Utrecht, Parquery took on the challenge of replacing induction loops with cameras. The cameras installed at a busy intersection additionally served to survey the modality split - vehicles, motorbikes and bicycles.


Pilot project in the Netherlands

Parquery detects road users approaching and waiting at traffic lights in video streams

How do camera-based adaptive traffic signals make a difference?


Traffic engineering and control

Get ahead of the chaos.

  • Optimize the efficiency of signalized intersections by adapting traffic lights to the live demand, i.e., adjust the timing of red and green lights
    • Direct and optimize the traffic flow through the road network
    • Sensing for intelligent transportation system (ITS)
  • Implement signal priorities
    • Lengthen or shorten the traffic light phases, give green light extensions when needed
Parquery supports traffic engineering and control

Traffic and urban development


Make the city safer and more liveable, foster change, and make policies based on evidence.

  • Improve public satisfaction and service level of the roads
    • Reduce congestion and its costs (like fuel and lost time) through smoother flow
    • Cut down drivers’ waiting time, and help them reach their destination faster
    • Improve travel time reliability by progressively moving vehicles through green lights
  • Cut down vehicle emissions and air pollutants that affect residents’ health
    • Less idling
    • More energy-efficient driving, lower fuel consumption - less braking and accelerating
  • Make the roads safer with fewer rear-end collisions


  • Prioritize user groups and increase the share of public and active mobility (such as cycling and walking) at the expense of car traffic, e.g.
    • Green wave for cyclists - seeing cyclists whizz past as an incentive for motorists to ride their bike next time
    • Priority for pedestrians - make the city walkable
    • Give precedence to public transport (e.g. bus lanes, trams) to encourage switching
Parquery's traffic solution cuts down drivers' waiting time



Parquery's AI algorithms help prioritize cyclists



Parquery's AI algorithms help prioritize pedestrians in traffic

Asset management


Peace of mind with reliable traffic infrastructure and technical equipment

  • Works for any road surface, even patched-up or gravel roads
  • Non-destructive (no damage to the road surface)
  • No traffic interruption during installation or maintenance
  • Choose the camera that best suits your requirements and conditions
  • Be fail-proof and swap one camera for another should it break down (without even stopping the traffic)
  • Cap servicing and running costs and time with
    • Low-maintenance, reliable sensors (cameras)
    • An flexible learning software solution instead of a one-size-fits-all product
    • Multiple uses for the existing or new infrastructure (e.g., CCTV and adaptive traffic light control)
Parquery's traffic solution works for any road surface, even gravel roads

Parquery guarantees data protection and privacy

Our software runs on a small edge computer directly on site.

Thus, video data never leaves the location.

GDPR - Parquery guarantees data protection and privacy


We do not record private data and strictly comply with the General Data Protection Regulation (GDPR) and the Swiss Federal Act on Data Protection (FADP).

Our dedicated data protection page explains how and which options are available.

CH - FADP - Parquery guarantees data protection and privacy

Get in touch to start controlling your traffic signals in real-time with AI


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