Vehicle queue length measurement

Capture of the number of the vehicles waiting in a lane

The solution serves the capture of real-time information about the number of vehicles waiting in a given lane measuring the queue length. Thanks to Sensefields technology, it is possible to determine the size of each of the vehicles waiting in the queue, and by this way, determine the total length of the queue in a specific lane. Finally, using the level of occupancy data, it is possible to know when the queue has reached a specific point, and generate a real-time alarm.

Download Vehicle queue length measurement (PDF)
  • Queue length measurement of any distance
  • Multiple applications at points, where queue is generated such as stop zones, traffic lights, road barrier, highway access ramps and road tolls
  • Installation as a single application or as part of a complex system
  • Automatic generation of alarms to optimize the traffic conditions

In order to determine and improve the arterial performance especially under saturated traffic conditions that cause congestion, associated delays and pollution, the data about the number of vehicles queuing is useful for devising traffic management strategies that help by the decision making towards the improvement of the traffic network performance.


Removable and disposable batteries and electronics.


Replacement or battery change within a few minutes.

Ready to use

Collection and analysis of traffic data from the first minute of installation. Predefined configuration “Plug & Web” solution: connect sensor and start collecting data without any further configuration.

Self-calibration of the detection thresholds

It is not affected by structures in the road so it can be used in urban tunnels. It can be installed in areas close to metro lines, railway stations.

Highly accurate

Accuracy not affected under heavy weather conditions and visual factors such as shadow and lighting. Not affected by occlusion.

Fast, simple and low-cost installation

Minimal infrastructure intervention with a minor perforation in the pavement. Minimum time of road intervention without extensive engineering work, destructive trenching or cutting required and wires required.

Low maintenance costs

Battery life up to 10 years under standard conditions. No specialised personnel or tools required.

No recalibration required

No loss of reliability with the pass of time. Recalibration not required.

Standalone solution

No router, server, PLC or electric cabinet required. Possibility of installing without a dedicated electrical connection via solar panel or partial supply from a street lamp.


Direct and easy integration with Traffic Management Centres and local devices such traffic lights, traffic signals and VMS


Sensors and batteries can be removed from the enclosure for reuse in other installations either as permanent or temporary solutions for prospecting, monitoring and auditing.


Works in any climate and usage conditions thanks to the rugged enclosure that supports long time exposure to severe weather conditions


Sensor Mote

Data Collecting Station - DCS


Barcelona airport taxi flow monitoring

Sensefields wireless magnetic sensors technology was installed at the taxi pick-up areas of the Barcelona Airport “El Prat” to efficiently handle the millions of passenger arrivals every year by reducing congestion, ensuring road safety and maintaining continual taxi availability.


Controlling the "parking express" zones

To efficiently control the heavy traffic flow on the short stay parking zones of Barcelona Airport, El Prat, Sensefields intelligent traffic management technology was installed at the "parking express" areas in order to better manage those busy sections of the airport premises based on automated data.


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