Flow Control


The automation of the call forward process is a trigger to improve service quality and efficiency. Flow Control is a proven solution which identifies the availability of service positions (like security screenings or immigration counters) with sensors and displays the next available position to passengers. The real-time algorithm guarantees a highly efficient usage of service points by reducing idle times and an improved service quality by guiding passengers to the optimal service position.

- The idle times between passengers can be reduced.
- Customers can find the way to the next available service point quickly, efficiently and easily.
- Special queues can be provided for certain passengers (fast lane, PRM) on demand and subsequently returned to regular queues.
- Operators can monitor and control the situation in a web dashboard from remote.
- Data analysts can learn from history and improve plans for operating the service point.
- Administrators can configure, adapt or change all aspects of the system on a web-based interface.


  • Security Screening
  • Immigration / Border Control

Other Industries:

  • Leisure facilities - Cash registers


Flow Control is a specialised optimising software that dynamically allocates waiting passengers to service points. Sensors at the service points measure the number of persons waiting (mini queue) or if a passenger is being served. Monitors at the queue exits display the next service position to the passengers, whilst lights above the service station blink when a passenger is called to

The system can deal with up to four different type of queues, such as priority, family queues and PRM, as well as several queue exits for queues of the same type. These different categories of travellers are allocated to the various service points according to the service level for every queue in real-time. It continuously  measures the number of customers waiting e.g. in a fast-lane it permanently allocates more or less of the available service points (lanes) to stay below a maximum waiting time for fast-lane customers.

At the same time customers with lower priority are held back to make the required fast-lane capacity available. Flow Control is a solution that integrates data by third-party sensors or by Via Guide sensors and displays the information on existing monitors or on our own monitors.


The forwarding screen which indicates the next available position to passengers needs to be placed at the exit of the queue. The customer can provide any kind of screen that is suitable for the solution. Our Monitor Controller generates the picture and transmits it to the screen.

For third-party screens monitor stands can be built out of taller Beltrac posts.

If there is limited space between the queue and the service positions the MON07 screen is a perfect solution. It’s a screen similar in size to a small tablet which is mounted at eye level on a taller Beltrac post at the exit of queue, clearly visible to passengers. This is recommended for queues with experienced  passengers such as priority and business class.

The types of switches vary from key switches, knob switches, contact switches or virtual switches on the dashboard.


The station lights indicate with their flexible illumination behaviour the status of service position or mini queue. Below is the set we have found most effective:

  • Green flashing: Calling for passengers
  • White steady: Available, currently not calling
  • Off: Service position not available

Sensors measure the filling level of holding queues and mini queues, as well as the movement at the exit of queues.

All the generated data is available on our dashboard in real-time. There, service positions can also be opened and closed and system decisions can be overridden. Historical data is being aggregated and can be analysed on our analytics platform or through an API on any other business intelligence.


Sensors at the service points
Sensors measure if passengers are being served at the service point or if they are waiting in the holding queues in front of it.

Lanes and priority management
At special lanes, such as fast lanes or PRM lanes, sensors identify if passengers are waiting and trigger the algorithm to allocate service points or screening lanes to them.

Stands, screens and monitors
Monitors at the queue exits  display the next available counter or screening lane to passengers. The screens can be designed in line with the customers’ corporate designs, with animated graphics also possible. The RGB Station Lights at the service position show the current status of the position with predefined illumination and flashing.

Manual request

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