The Author of this report has been asked to clarify the distinction between LTI type vehicles and saloon type vehicles. The reason being is that in this particular instance the use of the Generic word "Taxi" is highly inappropriate.
The following is the press release taken from Imperial College website with the make of the offending vehicle added by myself. In future, it would be less misleading and more desirable if these researches would clarify their subject matter more accurately.
Now we know that LTI are the top pollutants I wonder if and how they will defend their position? I also wonder what "Leicester council" and "Allied" will make of this when they read it? So, let me try to fathom out what youhave done here.
You take a report, do not like how it reads, and then fraudulently re-write it to suit your needs. Is that legal?
Question one.when you questionably claim these vehicles are the most polluting, do you mean equally all TX11, TX1 Fairways, and FX4 cabs, and if so why?
Question two. Is something not being done (in London) to combat this?
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Taking an LTI London Black taxi could increase your exposure to pollution. For immediate release
Tuesday 10 January 2006
Researchers have discovered that your level of exposure to pollution can vary according to what method of transport you use, with travelling by LTI London type taxis resulting in the highest levels of exposure and walking one of the least.
Research published in the journal Atmospheric Environment, describes how the team from Imperial College London and the Health and Safety Laboratory, Buxton, measured and visualised exposure to pollution levels, while using a variety of different transport methods for travelling across London.
The researchers looked at five modes of transport, including walking, cycling, car, London taxi and bus, and measured levels of exposure to ultrafine particles when travelling on them using a newly developed system that uses in combination an ultrafine particle counter and video recorder.
Walking to work may result in least exposure to pollution
Ultrafine particles are less than 100 nanometres in diameter and mainly traffic related. Their small size and large surface area means it is possible to inhale large quantities which makes them particularly dangerous.
The visualisation system allows video images of individuals activities to be played back alongside the ultrafine particle concentrations they are exposed to. As a result, most activities and behaviours that cause high exposures can be visibly identified, such as being trapped on traffic islands and waiting in congested traffic.
On average, while travelling in a LTI London taxi, passengers were exposed to over 100,000 ultrafine particles counts per cubic centimetre (pt/cm3), travelling in a bus resulted in exposure to just under 100,000 pt/cm3, travelling in car caused exposure to 40,000 pt/cm3, cycling was around 80,000 pt/cm3, and walking was just under 50,000 pt/cm3.
Surbjit Kaur from Imperial College London, and first author of the paper, said: "It was a real surprise to find the extent to which walking resulted in such a low exposure. The higher exposure from travelling in taxis may come from actually sitting in the vehicle while being stuck in traffic where you are directly in the path of the pollutant source. Also the fact that taxis are probably on the road for much longer than your average car could cause an accumulation of ultra fine particles."
Dr Mark Nieuwenhuijsen from Imperial College London, added: "The particular strength of the system is the visual aspect. The new monitoring and visualisation system is an effective environmental risk communication tool that can be used to identify, visualise and avoid hotspots of pollution."
The study was carried out as part of the DAPPLE (Dispersion of Air Pollution & Penetration into the Local Environment) project, which looks to provide a better understanding of the physical processes affecting street and neighbourhood scale flows of air, traffic and people, and their corresponding interactions with the dispersion of pollutants. The project consortium includes the University of Bristol, the University of Cambridge, Imperial College London, University of Leeds, University of Reading and the University of Surrey.
DAPPLE is funded by the Engineering and Physical Science Research Council. Further information about the project and exposure visualisation samples can be seen at
www.dapple.org.uk