Emissions Factors Toolkit User Guide
Contents
1. to nitrogen dioxide NO32 which can be harmful to health NO and NO are both oxides of nitrogen and together are referred to as nitrogen oxides NOx Particulate Matter less than 10 in aerodynamic diameter Particulate Matter less than 2 5um in aerodynamic diameter Transport Research Laboratory 18 Local Air Quality Management Helpdesk This Helpdesk has been set up on behalf of Defra and the Devolved Administrations to offer assistance to Local Authorities in managing air pollution in their area The Helpdesk provides e answers to Local Authorities questions on air quality monitoring modelling and emissions inventories e information and guidance to assist Local Authorities in carrying out the Local Air Quality Review and Assessment process required under Part IV of the Environment Act 1995 and e information and guidance to assist Local Authorities in preparing and implementing Air Quality Action Plans for improvement of local air quality Contact details for the Local Air Quality Management Helpdesk can be found at http lagm defra gov uk helpdesks html Appendices Appendix A Calculation Procedure The following documents the calculation procedure for generating the vehicle emissions in g km g km s and kg year or tonnes year please see the User Guide for more information NOx and HC COPERT4 10 Vehicle Type Vehicle Type Vehicle Type Degradation in emissions due to accumulat2. London Northern Ireland Scotland and Wales 6 Enter the Year for which you wish to predict emissions Years 2008 to 2030 can be selected 7 Select one of the following Traffic Formats which matches your available data using the drop down box England not London 2008 Basic Split Assumes standard fleet composition for the selected road type with specified HDV HGV and buses coaches Allows fleet input by Car Taxi SL GV HGV Bus and Coach Motorcycle Allows fleet input by Car Taxi eL GV Rigid HGV Articulated HGV Bus and Coach Motorcycle Allows fleet input by Petrol Car Diesel car Taxi LGV Rigid HGV 96 Articulated HGV Bus and Coach Motorcycle Note 3 Taxi refers to Black Cabs and can only be entered when London is selected in Area Type 8 Under the header SourcelD enter a name for each of your roads this can be anything you like You can enter up to 10 000 road links The SourcelD doesn t have to be unique although if there are duplicate names and the data are to be used in detailed dispersion modelling this may cause errors 9 Under the Road Type header select a road type from the following list Use this option for roads that are not motorways or similarly fast flowing roads in urban areas by the DfT definition of an urban area with a population of 10 000 or more Use this option for roads that are not
3. Under the Link Length km enter the length of each road link This is only required if the Annual Link Emissions option has been specified 15 If you require the output to be saved in a new workbook tick the box and specify a file name next to File Name The file will be generated in the directory where you have saved the EFT 16 Click on Run EFT to run the calculations or Clear Input Data to recommence data entry 12 Please consult the Data Sources provided in Appendix C for more information 17 You will automatically be taken to the Output sheet of the workbook where the requested emission information for each source name and pollutant will be displayed 12 Advanced Options The following Advanced Options have been added to the EFT to provide greater choice in input options so that a user can more accurately represent the situation in their locality or test the impact of proposed intervention measures It is recommended that these features are only used by experienced air quality modellers If you are unfamiliar with using vehicle emissions factors and are not comfortable with the underlying methodology and limitations of these features their use is not recommended as results may be misinterpreted Further information can be obtained from the LAQM Helpdesk at http laqm defra gov uk helpdesks html Advanced Options Euro Compositions Alternative Technologies Output Contributions from Euro Clas
4. Conventional Vehicles Types Alternative Vehicle Types Petrol Cars Full Hybrid Petrol Cars E85 Bioethanol LGV Diesel Cars Plug In Hybrid Petrol Cars LPG LGV Petrol LGV Full Hybrid Diesel Cars B100 Rigid HGV Diesel LGV Battery EV Cars B100 Artic HGV Rigid HGV FCEV Cars B100 Bus Artic HGV E85 Bioethanol Cars CNG Bus Buses Coaches LPG Cars Biomethane Bus Motorcycles Full Hybrid Petrol LGV Biogas Bus Taxi London only Plug In Hybrid Petrol LGV Hybrid Bus Battery EV LGV FCEV Bus FCEV LGV B100 Coach e source apportionment for Light Duty Vehicles LDVs and Heavy Duty Vehicles HDVs and individual vehicle classes All the calculations are based on average fleet composition for a given year and for a given road type urban rural motorway and whether the road is in London or outside London However advanced options are also available to users to alter fleet composition information The calculations procedure for generating the vehicle emissions in g km g km s and kg year or tonnes year can be found in Appendix A and the EFT process map can be found in Appendix B Details of the EFT Version 6 Note 1 Updates to the EFT can include both minor and major changes that may affect the output of the Tool In order to be confident that your outputs are the most up to date it is strongly recommended that Input Data are re run using the lastest Version Issue Defra and the Devolved Admin
5. each box confirms whether the proportions add up to 1 3 Users must populate the orange boxes with the default Euro class and size information first by clicking the Populate User Defined Euro Proportions with Default Year and Area Euro Proportions button before manually editing the orange boxes for those vehicle types they wish to alter An error message will be shown if proportions in all orange boxes do not add up to 1 and the EFT will not run 4 Users must remember to enter the traffic fleet information for each road link on the Input Data sheet in order to run the model IMPORTANT Unlike Fleet Data entered into the Input Data worksheet which refer to vehicle mix by main vehicle type based on automatic or manual traffic count data the Euro Class proportions entered into the UserEuro worksheet must be based on more detailed information on the age mix of vehicles seen on the road e g from Automatic Number Plate Recognition activity data 5 The Euro compositions incorporated within the EFT are different for NO and PM and other pollutants as in some cases the standards that apply differ Therefore your entered fleet data should be added in both sets of tables where necessary 14 Note 5 Emission reductions that can be achieved by retrofitting HGVs with Selective Catalytic Reduction SCR systems have not been confirmed at this stage As a result if any proportion information is input next to boxes ending in the
6. standard emission factor for the Euro class of that HGV will be used It is intended that the EFT will be updated as and when further data becomes available on the likely effectiveness of such systems e Alternative Technologies Should you wish to predict the impact on emissions of introducing vehicles with alternative technologies to the traffic fleet under consideration then the following procedure should be followed 1 In the Advanced Options box of the Input Data sheet select Alternative Technologies 2 Select Alternative Technologies in the drop down box adjacent to Traffic Format 3 Under Traffic Flow header enter the number of vehicles on each road This will usually be vehicles per day i e AADT flow but can be any time period up to one day 24 hours 4 Enter the percentage of the total traffic flow of each vehicle type in all categories If a vehicle category has no vehicles a O must be entered The following additional vehicle categories are available 15 Full Hybrid Petrol Cars Plug In Hybrid Petrol Cars Full Hybrid Diesel Cars Battery EV Cars FCEV Cars E85 Bioethanol Cars LPG Cars Full Hybrid Petrol LGV Plug In Hybrid Petrol LGV Battery EV LGV FCEV LGV E85 Bioethanol LGV LPG LGV B100 Rigid HGV B100 Artic HGV B100 Bus CNG Bus Biomethane Bus Biogas Bus Hybrid Bus FCEV Bus B100 Coach Petrol Hybrid Electric Vehicle Cars Petrol Plug in Hybrid Electric Vehicle Cars
7. 151441 NAEI Road Transport Biofuels report 2008 v1 pdf and also by the Air Quality Expert Group https www gov uk government uploads system uploads attachment data file 69338 pb13464 road transport biofuels 110228 pdf Details of Historic Versions of the EFT EFT Release Date Reason for Release Summary of Changes Version Issue Issue 6 0 1 July 2014 Minor bug fixes and or enhancements see Appendix C Version 6 0 June 2014 See Details of the EFT Version 6 page 4 Issue 5 2c January 2013 Added Advanced Options to the Input Data worksheet allowing Advanced Users to provider a User Defined Euro Compositions and Alternative Technologies and output relative percentage contributions from Euro Classes Version 5 1 1 June 2012 Updated NO emission factor and vehicle fleet information NO Emission Factors were taken from the EEA COPERT 4 v8 1 emission calculation tool Emission Factors for other pollutants were those published by the DfT on 29 June 2009 Issue 4 2 2 November 2010 Bug Fix Bugs were related to 5 emissions due to brake and tyre wear and only affected emissions calculated using the Traffic Fleet option Issue 4 2 1 October 2010 Bug Fix Bug occurred when modelling specific vehicle classes e g buses only Issue 4 2 June 2010 Updated version included advanced options for User Defined Traffic Fleet and Euro Composition information Version 4 1 February 2010 Upd
8. 5 www defra gov uk Department for Environment Food amp Rural Affairs Emissions Factors Toolkit User Guide July 2014 DOE DAA Llywodraeth Cymru Department of The Scottish Welsh Government Government www doeni gov uk Crown copyright 2014 You may re use this information not including logos free of charge in any format or medium under the terms of the Open Government Licence To view this licence visit www nationalarchives gov uk doc open government licence or write to the Information Policy Team The National Archives Kew London TW9 4DU or e mail si nationalarchives gsi gov uk This document publication is also available on the LAQM website Any enquiries regarding this document publication should be sent to us at laqmhelpdesk uk bureauveritas com 1 http lagm defra gov uk review and assessment tools emissions factors toolkit html Change Log Version Details of Changes Made July 2014 Updated with EFT 6 0 1 release June 2014 Issue Contents PEE EET DELLI 1 The Emissions Factors Toolkit EE T ia eet b d atu b Fe br sa ae ted e ex oreet 2 eae ee ee aR 2 Details of the EFT Version 6 ecc 4 Details of the Current EFT Issue 6 01 5 a ipekin dz eee cO 7 ee 7 Rdvanced Options T 13 Local Air Qua
9. Diesel Hybrid Electric Vehicle Cars Battery Electric Vehicle Cars Fuel Cell Electric Vehicle Cars Bioethanol Cars Liquefied Petroleum Gas Cars Petrol Hybrid Electric Vehicle LGVs Petrol Plug in Hybrid Electric Vehicle LGVs Battery Electric Vehicle LGVs Fuel Cell Electric Vehicle LGVs Bioethanol LGVs Liquefied Petroleum Gas LGVs B100 Biodiesel Rigid HGVs B100 Biodiesel Articulated HGVs B100 Biodiesel Buses Compressed Natural Gas Buses Biomethane Buses Biogas Buses Hybrid Buses Fuel Cell Electric Vehicle Buses B100 Biodiesel Coaches 16 5 Enter the Speed kph No of Hours and Link Length km details as normal Note 6 When running the EFT with the Advanced Option for Alternative Technology Vehicles then the vehicle category Bus and Coach category only refers to conventional diesel vehicles unlike the standard Traffic Formats Basic Options 1 3 whereby default fleet assumptions include some alternative vehicles There is no need to apply any correction to allow for alternative buses such as hybrids For example if your fleet is 100 buses and 10 are hybrids then you would enter 90 under bus and coach and 10 under hybrid bus Users may also use the Euro Defined Advanced Option to alter the proportion of Buses and Coaches Note 7 If a user is running the EFT with the Advanced Options for Alternative Technology Vehicles with the London area then Note 6 also applies Default assumptions used for standard
10. EEA Emissions Inventory Guidebook 2013 http www eea europa eu publications emep eea quidebook 2013 17 Factors used in NAEI UK road transport emission projections Base 2013 version derived from the effects of fuel quality on emission factors including effect of low strength biofuel blends Biofuel effects report at http uk air defra gov uk reports cat15 0901151441 NAEI Road Transport Biofuels report 2008 v1 pdf 18 http naei defra gov uk resources NAEI Emisison factors for alternative vehicle technologies Final Feb 13 pdf 23 Source Organisation Data set London Basic Fleet Compositions 02 10 2013 London LEZ Euro Compositions 02 10 2013 London Taxi Euro Compositions 02 10 2013 London Bus Fleet and Euro Compositions 02 10 2013 London Bus retrofit assumptions 02 10 2013 24
11. Traffic Formats Basic Options 1 3 for Bus and Coaches incorporate the detailed TFL bus fleet which includes hybrid buses The Advanced Option allows users to overwrite these assumptions The user can make further amendments to the conventional or hybrid fleet of London buses by also selecting the UserEuro option Advanced options Output e Output 6 Contributions from Euro Classes Selecting this option provides outputs broken down into the percentage contribution from each Euro Class within each Vehicle Category Using this option increases the model run time especially where a large number of road links are entered 17 Glossary Annual Average Daily Traffic Carbon dioxide EEA European Environment Agency EFT Emissions Factors Toolkit DfT Department for Transport Department for Energy and Climate Change HL Heavy Duty Vehicles It encompasses Rigid and Artic Heavy Goods Vehicles and Buses Coaches Hydrocarbons London Atmospheric Emissions Inventory Local Air Quality Management Light Duty Vehicles It encompasses cars taxis black cabs London and vans E National Atmospheric Emissions Inventory Nitric oxide NO is mainly derived from road transport emissions and other combustion processes such as the electricity supply industry NO is not considered to be harmful to health However once released to the atmosphere NO is usually very rapidly oxidized mainly by ozone
12. ated vehicle exhaust emission factors based on Department of Transport emissions factors published on 29 June 2009 Also included brake and tyre wear for and PM s Local Authorities are not required to redo any work already carried out using previous versions but are advised to use the latest version for future work Using the EFT In order to use the EFT you must enable macros in your MS Excel security settings before opening the spreadsheet When using Excel 2010 this can be found under DEVELOPER gt MACRO SECURITY gt MACRO SETTINGS gt ENABLE ALL MACROS For previous versions of Excel this can be found in TOOLS gt MACROS gt SECURITY LEVEL gt MEDIUM Basic Operation 1 Go to the Input Data sheet using the tabs at the bottom of the workbook 2 Inthe Select Pollutants box select the pollutants for which you require emissions information NO uses the COPERT 4 v10 NO emission factors and supersede the COPERT v8 emission factors used in the previous version Select Pollutants NOx Carbon Dioxide PM10 Hydrocarbons PM2 5 3 In the Select Outputs box select your required output from the following categories Select Outputs Additional Outputs Air Quality Modelling g km s Breakdown by Vehicle Emissions Rates g km Source Apportionment f Annual Link Emissions PM by Source FILE gt OPTIONS gt CUSTOMIZE RIBBON Tick DEVELOPER box on
13. e and Fuel Per year per vehicletype Emission degradation NOx and HC only incorporates mileage Fuel scaling NOx HC and PM Constants Per vehicletype based on speed fuel usage Euro composition Degradation Emission g km Expressed per Euro Classification per vehiclegroup as individual vehicle including failed catalysts per Euro class Weighted Emissions Per vehicleper road type Euro Classification Per vehicle Euro class per year PM2 5 Conversion Factors Road Type Composition Urban Not London Rural Not London Motorway Not London London Central London Inner London Outer London Motorway g km s entry Per vehicle year y Expressed per year NOx PM10 PM2 5 HC CO2 Total emission per traffic data Brake and Tyre Wear and Abrasion PM10 amp PM2 5 only Adjusted Brake and Tyre Wear and Abrasion PM10 amp PM2 5 only Traffic Data Flow Hours and Vehicle Proportions Emission g km vehicle group Link Length km Pollutant Emissions g km amp Annual Emissions g km s x Link Length x 3600x8760 g km s as above divided by time 21 Appendix C Minor Bug Fixes Enhancements Change Error in Output Output now as Tonnes Year not Kg Year Traffic Format Selection Selection of Alternative Technologies Format only allowed when Advanced Option Alternative Technologies is selected Header Cells for User Defined Pro
14. ed mileage only calculated for some petrol cars and petrol LGVs x x x Emissions Emissions Emissions NOx PM and HC COPERT4 10 Vehicle Type Vehicle Type Vehicle Type TRL DFT Vehicle Type Vehicle Type Vehicle Type PM PM g km PMi g km s The following documents the calculation procedure for generating the brake tyre wear and road abrasion emissions for PM4 and in g km and g km s PM Vehicle Type Vehicle Type Vehicle Type Vehicle Type Vehicle Type Vehicle Type Vehicle Type Vehicle Type Vehicle Type PM Brake Wear Tyre Emissions PM Road Abrasion x x x x x XX XXX X XXX Emissions Emissions Emissions Emissions Emissions Emissions 0 95 g km x Constants x x Constants x x Constants x Constants Constants Constants Constants Constants Constants x x xxx 0 95 g km s Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions Emissions xx KM KK KM MK OK Degradation Degradation Degradation Fuel Fuel Fuel Fuel Fuel Fuel Constants Constants Constants Constants Constants Constants Constants Constants Constants 0 4 PM g km 0 7 PM g km 0 54 Pilz g km x Fuel x Fuel x Fuel x Euro Composition Euro Composition x Euro Composition x x Euro Composition Euro Composition x Euro Composition x x Eur
15. istrations have provided an updated Emissions Factors Toolkit Version 6 which replaces all previous versions which should no longer be used The EFT is updated regularly in order to keep it current with the latest available data For Version 6 of the EFT through close liaison with the NAEI team Road Traffic Emission Projection assumptions for NOx and have recently undergone technical peer review Version 6 incorporates 1 updated NO emission coefficients for Euro 5 and 6 diesel cars taken from the European Environment Agency EEA COPERT 4v10 emission calculation tool reflecting more recent evidence on the real world emission performance of these vehicles 2 updated NO emission coefficients for Euro 5 and 6 LGVs Vans based on scaling of the diesel car emission factors 3 updated Hydrocarbon and PM speed emission equations for all vehicles using COPERT 4v10 4 updated fleet composition accounting for e NAEI changes to uptake rates for newer vehicles and low emission vehicles based on information from DfT on projected sales of new cars and LGVs e updated forecasts in the vehicle mix on different road types based on the January 2013 Department for Transport DfT traffic projections RS2013 and e updates to traffic and fleet projections in London based on information from Transport for London TfL 5 updated scaling factors to take into account the effects of changing fuel quality on emission factor
16. lity Management n 19 e N 20 Appendix A Calculation Procedure 20 Appendix B EFT Process 21 Appendix C Minor Bug Fixes Enhancements 22 Appendix D Data 23 Introduction This road traffic Emissions Factors Toolkit EFT user guide has been compiled by Bureau Veritas in the role of Project Manager for the Local Air Quality Management LAQM Helpdesk The EFT is published by Defra and the Devolved Administrations to assist local authorities in carrying out Review and Assessment of local air quality as part of their duties under the Environment Act 19952 It is a tool that allows users to calculate road vehicle pollutant emission rates for oxides of nitrogen NO Particulate Matter PM4o and and hydrocarbons HC for a specified year road type vehicle speed and vehicle fleet composition Carbon dioxide COz emission rates can also be calculated for petrol and diesel fuelled vehicles The purpose of this user guide is to explain in detail the methodology datasets and assumptions used in the development of the EFT and to provide guidance on its use This user guide also c
17. motorways or similarly fast flowing roads outside urban areas Use this option for motorways and fast dual carriageways Use this option for roads in Central London as defined in the London Atmospheric Emissions Inventory Use this option for roads in Inner London as defined in the LAEI Use this option for roads in Outer London as defined in the LAEI Use this option for motorways and fast dual carriageways in Greater London Note 4 The urban categorisation relates to the DfT definition of an urban area with a population of 10 000 or more The London road types use the area categories defined in LAEI 10 Under Traffic Flow header enter the number of vehicles on each road This will usually be vehicles per day i e AADT Annual Average Daily Traffic flow but can be any time period up to one day 24 hours 8 Roughly corresponds to the original boundary of the Central London Congestion Charging Zone CCZ implemented in February 2003 and is made up of some of the LAEI 1 km grid squares in the London boroughs of Camden City of London Islington Lambeth Southwark Tower Hamlets and Westminster see LAEI documentation for full details http data london gov uk datastore package london atmospheric emissions inventory 2010 10 Consists of some of the LAEI 1 km grid squares in the London boroughs of Camden Greenwich Hackney Hammersmith and Fulham Haringey Barnet Islingto
18. n Kensington and Chelsea Lambeth Lewisham Newham Southwark Tower Hamlets Wandsworth Westminster Waltham Forest and Redbridge see LAEI documentation for full details Consists of some of the 1 km grid squares the London boroughs of Enfield Barking and Dagenham Barnet Bexley Brent Bromley Croydon Ealing Harrow Havering Hillingdon Hounslow Kingston upon Thames Merton Richmond upon Thames Redbridge Sutton and Waltham Forest see LAEI documentation for full details 10 11 Enter the percentage of the total traffic flow of each vehicle type in the categories depending on the Traffic Format selected If a vehicle category has no vehicles a 0 must be entered 12 Under the Speed kph header enter the average traffic speed on each road this should relate to the same time period as the Traffic Flow This can be between 5kph and 140kph Where the maximum possible speed for a vehicle defined within emissions functions is below the specified speed the emissions for the maximum speed in the range designated for that vehicle s emission factors will be used Similarly where the speed entered is below the minimum speed allowed for that vehicle type the minimum will be assumed 13 Under the No of Hours header enter the time period used for the Traffic Flow for example if you entered the number of vehicles per day this will be 24 but if you entered the number of vehicles per hour this will be 1 14
19. o Composition x Euro Composition x Euro Composition x Euro Composition x Euro Composition x Euro Composition x Euro Composition x Euro Composition x Euro Composition x Euro Composition x Road Type x Euro Composition x Road Type x Euro Composition x Road Type x Road Type x Road Type x Road Type x Road Type Road Road Type Road Type Road Type Road Type Road Type Road Type Road Type Road Type XXX KKK KKK g km 1 3600 x hours 1 3600 x hours g km 3600 x hours 3600 x hours g km g km g km 3600 x hours 3600 x hours 3600 x hours 3600 x hours 3600 x hours 1 3600 x hours ow ow I x x x x x g km 3600 g km s 3600 hours link length km x 3600x8760 1000 kg year g km s link length km x 3600x8760 1000 Q km s link length km x 3600x8760 1000 kg year g km s g km s g km s link length km x 3600x8760 1000 ko year link length km x 3600x8760 1000 ko year link length km x 3600x8760 1000 ko year Source EFT Version 6 Background Information 20 Appendix B EFT Process Map Initial Input Parameters Year 2008 2030 Speed 5 140kph Vehicle Emissions g km Per vehicletype basedon vehicleclassification per speed Vehicle Emissions g km Per vehicletype basedon vehicleclassification per speed Emission Degradation Mileag
20. onsolidates information regarding previous versions of the EFT their main changes and updates 3 http www legislation gov uk ukpga 1995 25 contents The Emissions Factors Toolkit EFT About the EFT The latest EFT can be downloaded from the LAQM website It provides emission rates for 2008 through to 2030 and takes into consideration the following information available from the National Atmospheric Emissions Inventory NAEI e fleet composition data for motorways urban and rural roads in London and rest of the UK e fleet composition based on European emission standards from pre Euro to Euro 6 VI e scaling factors reflecting improvements in the quality of fuel and some degree of retrofitting and e technology conversions in the national fleet The EFT can be used to provide the following information e emission rate as g km s or g km from the total traffic e calculation of PMi9 and 5 from tyre and brake wear and road abrasion emission Sources e breakdown of emissions for conventional vehicle types which include 8 conventional vehicle categories such as petrol and diesel cars for the UK plus taxis for London and alternative vehicles such as hybrid petrol cars depending on user information http lagm defra gov uk review and assessment tools emissions factors toolkit html http naei defra gov uk A full list of the vehicle categories available within the EFT is provided below
21. portions User Size Distributions are now fixed in the UserEuro sheet when Populated With Defaults and do not change based on Input Data Area Year Date 02 07 2014 22 Appendix D Data Sources Source Data set Date Organisation UK Outside London Euro Compositions 03 10 2013 Fleet Compositions per Road Type Outside 03 10 2013 London Vehicle Size Proportions 03 10 2013 to Conversion 23 05 2010 Assumptions 11 08 2009 Brake Tyre and Road Abrasion PM assumptions 30 10 2009 SCR EGR Proportions 13 02 2012 Treatment of Failed Catalytic Convertors 13 02 2012 Fuel Scaling 03 10 2013 Alternative Vehicle Emissions Assumptions 06 02 2013 NO vehicle emissions November 2012 PM vehicle emissions November 2012 HC vehicle emissions November 2012 C vehicle emissions 07 08 2009 Mileage Rates 07 08 2009 14 Data listed here are data developed for or by the 2011 version of the National Atmospheric Emissions Inventory and NAEI UK road transport emission projections Base 2013 version The methodology used in the NAEI can be found at http naei defra gov uk reports reports section id 2 15 Fleet projections based on fleet turnover model used in NAEI UK road transport emission projections Base 2013 version using vehicle sales projections provided by DfT 2013 16 Assumptions used in the NAEI based on information from the EMEP
22. right hand side menu 7 Ensure this option is turned off after using the EFT as potentially dangerous code can run Selecting this option provides outputs as total emissions as g km s for the pollutant s selected Selecting this option provides outputs as total emissions as g km for the pollutant s selected Selecting this option generates emissions of each pollutant per year for each road link in kg yr for all pollutants with the exception of which is in tonnes yr This option requires the length of each link to be specified 4 In the Additional Outputs box select your required output from the following categories Selecting this option generates a separate output sheet showing the proportion of particulate emissions from Exhaust Brake Tyre and Road Abrasion Selecting this option provides the relative percentage contribution from the specified vehicle types for the pollutant s selected All output options above are provided for each vehicle type on the road link for the possible 31 vehicle categories within the EFT which include conventional and alternative vehicles types If you specify the Basic Split option then the emissions are based entirely on the vehicle fleet composition embedded in the EFT 5 Enter Area using drop down box This incorporates area specific information from detailed traffic surveys on fleet composition The areas available are England Not London
23. s particularly the addition of small amounts of biodiesel and bioethanol at up to 1096 strength blends in commercial petrol and diesel fuels The factors are based on evidence of the effect of biofuels on pollutant emissions reviewed by the 6 bug fixes e For the Detailed Option 3 traffic format the functionality to allow you to specify the petrol diesel split when the alternative technologies box is ticked has been corrected Details of the Current EFT Issue 6 0 1 Issue 6 0 1 incorporates 1 Minor bug fixes and or enhancements see Appendix C Note 2 emissions calculated by the EFT are those associated with tailpipe emissions from petrol and diesel vehicles only While new alternative fuelled vehicles such as hybrids are now included within the national fleet CO emissions from these vehicles are not included as the EFT does not calculate the full impact of these technologies on CO for example from electricity or hydrogen production etc Tools are available for calculating Greenhouse Gas GHG emissions from a range of fuels and technologies such as Defra DECC GHG Conversion Factors at https www gov uk measuring and reporting environmental impacts quidance for businesses http www ukconversionfactorscarbonsmart A list of the data sources used for the development of the current EFT can be found in Appendix D Reported in http uk air defra gov uk reports cat15 0901
24. ses Advanced options Input e Euro Compositions Should you wish to specify the Euro classification of the fleet used in the emission calculations to more accurately reflect local conditions or test intervention measures under consideration then the following procedure should be followed 1 Inthe Advanced Options box of the Input Data sheet select Euro Compositions Go to the UserEuro sheet that is generated This displays all of the Euro class splits that will be used in the calculation of emission factors The proportions in each box add up to 1 100 The boxes with headings in blue display the default proportions built into the toolkit based on the selected Road Type Area and Year Using the UserEuro option allows users to define the following information 13 Scaling factors used for Alternative Technology vehicles will shortly be available from http naei defra gov uk 13 The Euro proportions for the conventional fleet Euro proportions for alternative technologies Vehicle size distribution for the conventional fleet and Vehicle size distribution for alternative technologies This is accomplished by manually populating the relevant User Defined orange boxes boxes with headings in orange 2 The boxes with headings in orange will be used in the calculations if the Euro compositions option has been selected The proportions in each box should always add up to 1 100 or 0 0 The text adjacent to
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