What Equipment is required for testing NOx output of motorcycles for ULEZ
Request ID: FOI-0565-1920
Date published: 12 June 2019
You asked
To TFL
Please confirm the make and model of equipment required to test motorcycles for ULEZ exemption, specifically testing NOx output to produce a Certificate of Conformity.
I do not consent to my information being shared with associated organizations outside/beyond the scope of my foi request.
regards
We answered
TfL Ref: EIR-0565-1920
Thank you for your request received by Transport for London (TfL) on 24th May 2019 asking for information about the equipment used to test motorcycles for ULEZ exemption.
Your request has been considered in accordance with the requirements of the Environmental Information Regulations and our information access policy.
You asked:
“Please confirm the make and model of equipment required to test motorcycles for ULEZ exemption, specifically testing NOx output to produce a Certificate of Conformity.”
TfL does not hold the requested information. TfL does not itself test vehicles to see if they are ULEZ exempt. Rather, this is carried out by an approved test facility commissioned on our behalf. In approving a test facility, TfL needs to be satisfied that the facility can perform emissions tests in accordance with the type-approval regulations for that class of vehicle. TfL does not specify the make and model of equipment required to perform the testing.
The testing that would be required for motorcycles is the type-approval ‘type 1’ emissions test. This test must be performed on a dynamometer capable of being adjusted for appropriate road-load coefficients and with a driver aid capable of displaying the appropriate velocity/time co-ordinates for the legislative drive cycle for each class of motorcycle. Emissions analysis must be by a minimum of a 5 gas analyser specified to measure NOx over the required drive cycle, whilst taking account of total gas volume over the same cycle, and producing a single value in grammes/km. Emissions testing is to be carried out in accordance with the regulation ECE/TRANS/180/Add2
Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed.
Yours sincerely,
David Wells
FOI Case Officer
FOI Case Management Team
General Counsel
Transport for London
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