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: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>