Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Safety belts in police cars may be life threatening

17.05.2005


Two new tests by VTI (Swedish National Road and Transport Research Institute) have investigated traffic safety for police in their cars. The hypothesis that the personal equipment or the uniform might affect the function of the seat belt in a collision was put to test. The study points out that an alternative, professional use of vehicles ought to be more generally considered in relation to the crash safety aspects.

VTI was contacted by the National Police Board of Sweden in the course of an internal investigation of a traffic accident in which a policewoman was killed. Even though there was nothing about this accident which specifically indicated that the equipment which the police carry on their uniform directly caused the tragic outcome of the accident, it gave the impetus for an investigation whether any of the many items of equipment carried on the uniform entails a risk, and whether appropriate measures might also be identified to change or reduce the risks. It was therefore decided to study the working environment of the police in police cars, by performing two collision tests.

In two crash tests, the hypothesis that the personal equipment which the police carry on their uniform might affect the function of the seat belt in a collision was put to the test. To sum up, it can be said that nothing was found to indicate that the flak jacket has a significant negative effect on the function of the belt. It was further found that the items of equipment carried on the equipment belt around the waist do not themselves entail any significant increase in risk, even though it cannot obviously be excluded that even small but sharp objects can cause local but severe injuries in accidents. More generally, it is found that, in a purely physical sense, the size of the uniform belt displaces the lap portion of the seat belt from its correct position around the hips of the wearer, which gives rise to an evident risk of submarining. At present, a normal belt tensioner is not able to recover all the slack which the equipment induces.



Many professional groups use a vehicle as an essential part of their work. The vehicle is not only a means of transport, it is a tool and also, to a large extent, a workplace.

Vehicles that are used as part of people’s work, or the people who use the vehicle, are often equipped with tools and other equipment which may come into conflict with the damage alleviating system of the vehicle. The police, ambulance service and rescue service have many such vehicles with special equipment, but it is probable that guards, veterinary surgeons and district nurses also often have vehicles and equipment which may conflict with the requirement for vehicle safety in a crash.

Risks probably also exist for postmen in post vehicles, tradesmen in specially constructed vehicles or with a lot of tools in their tool belts, and perhaps also for the drivers of vehicles for the transport of valuables, vehicles which are probably neither easily deformable in a collision nor particularly easy for the Rescue Service to work on in the event of a rescue attendance after a traffic accident.

We have become accustomed to modern vehicles being fitted with all kinds of safety equipment. As far as direct personal protection in a collision is concerned, it is the seat belt and air bags that first come to mind. Different forms of load anchorage systems may also be said to be part of direct personal protection. What is more concealed but equally important from the standpoint of collision protection are details such as the design of the seat, the design of the neck/head restraint and e.g. the geometry of the seat belt and the presence of belt tensioners and their function. The seat usually also has submarining protection that cannot be seen by the naked eye.
A modern car is subjected to crash tests and receives approval, with only ”ordinary” dummies placed in the car seat, belted up properly and with air bags etc activated according to all the rules. An alternative, professional use of the vehicle, in relation to the crash safety aspects of the clothing or other equipment details of the passengers, is probably never published.

Mikael Höglund | alfa
Further information:
http://www.vti.se

More articles from Transportation and Logistics:

nachricht A helping (Sens)Hand
11.04.2018 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO

nachricht Study sets new distance record for medical drone transport
13.09.2017 | Johns Hopkins Medicine

All articles from Transportation and Logistics >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Spider silk key to new bone-fixing composite

University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.

Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

Im Focus: Basel researchers succeed in cultivating cartilage from stem cells

Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.

Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...

Im Focus: Like a wedge in a hinge

Researchers lay groundwork to tailor drugs for new targets in cancer therapy

In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Magnetic nano-imaging on a table top

20.04.2018 | Physics and Astronomy

Start of work for the world's largest electric truck

20.04.2018 | Interdisciplinary Research

Atoms may hum a tune from grand cosmic symphony

20.04.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>