Enforcement trailer

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An enforcement trailer used in Offenbach am Main

The " Enforcement Trailer " (proper spelling in capital letters) [ ɪnfɔːsmənt treɪlər ] ( english enforcement , enforcement ', trailer , trailers ' ) is a portable device for speed monitoring of the manufacturer Vitronic in the form of a trailer. It is characterized by the fact that it can be operated almost autonomously at any location and the technology inside the trailer is strongly protected against vandalism. The measurement technology used is based on the PoliScan Speed model from the same manufacturer.


From a distance, the enforcement trailer gives the impression of a parked trailer. Here: use on federal highway 192

The enforcement trailer looks like a trailer and can be moved with any motor vehicle with a trailer coupling. It also has its own drive with remote control for easy and precise alignment at the measuring location . The trailer can be lowered completely to the ground for measurement. The wheels disappear into the armored outer shell, which makes it difficult for unauthorized persons to move or transport it, as well as making it more difficult to set fire to it. An alarm system protects the measurement technology from vandalism. In addition, a bulletproof cover protects the system against property damage and an internal extinguishing system against fire.

The trailer is equipped with rechargeable batteries that allow uninterrupted measurement operation for at least five days. In order to extend the measuring operation, the batteries can be exchanged on site. An integrated modem transmits the measurement data in encrypted form via cellular network and enables remote access to the system. As a result, the measuring device offers a completely autonomous, multi-day measuring operation without the use of personnel.

Laser-based light detection and ranging technology is used for speed measurement . A scanning laser uses transit time measurement to determine the speeds and positions of all vehicles in the measuring field across several lanes simultaneously. Variable speed limits as well as driving bans according to time, lane and vehicle class (e.g. truck) can also be monitored.


The enforcement trailer costs around 120,000 to 150,000 euros. The system has been tested by various state police in Germany since 2015 . In 2015 the French police ordered 150 units of the system and in 2016 a further 100 units. There it is used under the name ALICE (short for Autonomous Lidar Concept for Enforcement ).

In the legal literature as well as in the case law of Germany, the classification of the enforcement trailer in the existing categories of mobile or stationary surveillance systems, as with all semi-stationary systems, is controversial. In some federal states, for example, responsibility for carrying out the monitoring depends on the assignment.

Web links

Commons : Enforcement Trailer  - Collection of images, videos and audio files

Individual evidence

  1. a b Enforcement Trailer: Autonomous speed measurement over several days. In: vitronic.de . Retrieved September 25, 2016 .
  2. Peter Schulte-Holtey: Super speed camera protected by a bulletproof metal hood: a new kind of police helper on the A3 construction site. In: op-online.de . September 24, 2016. Retrieved September 25, 2016 .
  3. a b Attention speeders: Here comes the Enforcement trailer. In: handelsblatt.com . August 12, 2016. Retrieved September 25, 2016 .
  4. Enforcement Trailer: This is how the police's new super speed camera works. In: RP Online. RP Digital GmbH, October 17, 2017, accessed on February 7, 2019 : "According to the authorities, the device equipped with an alarm device costs around 120,000 euros."
  5. Victoria Woollaston: Coming to a motorway near you: The armored SUPER speed camera that captures traffic on BOTH sides of the road across all lanes. In: dailymail.co.uk . December 18, 2015, accessed September 25, 2016 .
  6. Maria Kröhnke: Brandenburg is testing new super speed cameras. In: maz-online.de . April 20, 2016. Retrieved September 25, 2016 .
  7. Police are testing new super speed cameras at the A3 construction site near Offenbach and Obertshausen. In: op-online.de . August 11, 2016. Retrieved September 25, 2016 .
  8. Cegelec Alice Radar on YouTube .
  9. Klaus-Ferdinand Poretschkin, Pascal Förster: Semi-stationary measuring trailers as permanently installed systems . In: FRY 02/2017 . S. 132 ff .
  10. ^ AG Mettmann: Judgment of February 14, 2017, Az. 32 OWI 461/16. February 14, 2017. Retrieved October 18, 2017 .
  11. Düsseldorf Higher Regional Court: Decision of August 7, 2017, Az. IV-3 RBs 167/17. August 7, 2017. Retrieved October 18, 2017 .