On the road pollution monitoring

MQT on 2013-10-23
Session date: 
October 23, 2013
Question By: 
Jenny Jones
City Hall Greens
Asked Of: 
The Mayor


One of the recommendations from the Kings College Report on pollution in London was that regular Remote Sensing Detector (RSD) monitoring should take place to reality check the claims made for new and emerging technologies. Will you undertake an annual survey of the real world emissions coming from vehicles on London's roads.


Answer for On the road pollution monitoring

Answer for On the road pollution monitoring

Answered By: 
The Mayor

TfL is aware of King's College's work and the apparent disparity between 'real world' emissions and the assumptions underlying the vehicle emissions factors used in emissions and air quality models. Current modelling practice 'corrects' for this in terms of how they estimate the concentrations of pollutants, but TfL is keen to see improvements to enable us to more accurately assess the impact of traffic schemes.

To this end TfL has already undertaken independent tests of vehicles using London driving conditions, and has invested in camera technology to more accurately profile the vehicles actually operating in London. Along with the Kings work, we are currently investigating how the next iteration of the London inventories might use this new information. It is not yet clear to us that an 'annual survey' using remote sensing is the most appropriate course of action, but we do see a role for this type of monitoring to better understand the on-road performance of vehicles built to the latest 'Euro' emissions standards.