| Trucks | | Trucks conversions | Truck conversions refer to original diesel buses being converted to the use of alternative fuels, in most cases CNG or LPG.  |
| Trucks Retrofit Systems | Retrofit systems upgrade existing conventional diesel trucks with advanced technological equipment, in many cases in conjunction with low sulfur fuels. |
| Trucks Replacement Programs | Replacement programs replace or repower the existing truck engine with a new engine to meet lower emissions standards. |
| New Trucks Overview | The engine and emission control technologies for cleaner trucks are in principle very similar to those of buses. |
| Light Duty Gasoline | Light Duty Gasoline utilizing three-way catalytic converters and optimal engine operation for emission control |
| Light Duty Diesels | Light duty diesels use emission control technologies to meet tightened emission standards. |
| In-Use Trucks Overview | One of the first steps that can be taken is to assure that existing trucks receive good maintenance and the principle strategy to do this is an in use inspection and maintenance program. |
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| Selected Publications | - 7. Sustainable Transport: New Insights From the IEAs Worldwide Transit Study<Fulton, Lew>
- 1. Emission Control Retrofit of Diesel-Fueled Vehicles<MECA - Manufacturers of emissions control>
- 7. Interim Report: Emissions Results from Clean Diesel Demonstration Program with CRTTM Particulate Filter at New York City Transit<Matthey, Johnson>
- 1. Heavy-Duty Diesel Emission Reduction Project Retrofit/Rebuild Component<EPA>
- 1. Breathing Clean: Considering the Switch to Natural Gas Buses<Kojima, Masami>
- 9. Alternative Fuel Transit Buses - Final Results from the National Renewable Energy Laboratory (NREL) Vehicle Evaluation Program<Chandler, Kevin / Clark, Nigel / Kenneth, Kelly / Motta, Robert / Norton, Paul / Schumacher, Leon>
- 6. Analysis of Alternative Fuel Technologies for New York City Transit Buses<Sigall, Jonathan>
- 3. Older Gasoline Vehicles in Developing Countries and Economies in Transition: Their Importance and the Policy options for Addressing them<UNEP - United Nations Environment Programme>
- 8. Bus Futures - New Technologies for Cleaner Cities<Cannon, James S. / Sun, Chyi>
- 4. A Comparative Analysis of the Feasibility and Cost of Compliance of Potential Future Emission Standards for Heavy Duty Vehicles Using Diesel or Natural Gas<Austin, Thomas C. / Delaney, Siona S. / Heirigs, Philip L. / Lyons, James M.>
- 4. Breathing Clean: Considering the Switch to Natural Gas Buses<Kojima, Masami>
- 8. Alternative Fuel Transit Buses - Final Results from the National Renewable Energy Laboratory (NREL) Vehicle Evaluation Program<Chandler, Kevin / Clark, Nigel / Kenneth, Kelly / Motta, Robert / Norton, Paul / Schumacher, Leon>
- 2. Demonstration of Advanced Emission Control Technologies Enabling Diesel-Powered Heavy-Duty Engines to Achieve Low Emission Levels<MECA - Manufacturers of emissions control>
- 5. Clean Air Facts - Emission Controls for Diesel Engines<MECA - Manufacturers of emissions control>
- 9. MECA Independent Cost Survey for Emission Control Retrofit Technologies<MECA - Manufacturers of emissions control>
- 4. Frequently Asked Questions on Diesel Emissions and Diesel-Emission Control Technologies
- 2. Older Gasoline Vehicles in Developing Countries and Economies in Transition: Their Importance and the Policy options for Addressing them<UNEP - United Nations Environment Programme>
- 4. Clean Air Facts - Emission Controls for Diesel Engines<MECA - Manufacturers of emissions control>
- 5. Bus Futures - New Technologies for Cleaner Cities<Cannon, James S. / Sun, Chyi>
- 12. Retrofit Diesel Particulate Filter Application Considerations and Experience<International Diesel Retrofit Advisory>
- 10. Bus Futures - New Technologies for Cleaner Cities<Cannon, James S. / Sun, Chyi>
- 2. Interim Report: Emissions Results from Clean Diesel Demonstration Program with CRTTM Particulate Filter at New York City Transit<Matthey, Johnson>
- 6. MECA Independent Cost Survey for Emission Control Retrofit Technologies<MECA - Manufacturers of emissions control>
- 3. Interim Report: Emissions Results from Clean Diesel Demonstration Program with CRTTM Particulate Filter at New York City Transit<Matthey, Johnson>
- 8. Retrofit Diesel Particulate Filter Application Considerations and Experience
- 5. Interim Report: Emissions Results from Clean Diesel Demonstration Program with CRTTM Particulate Filter at New York City Transit<Matthey, Johnson>
- 4. Life Cycle Assessment of Fuel Cells and Relevant Fuel Chains<Beer, Tom>
- 7. Bus Futures - New Technologies for Cleaner Cities<Cannon, James S. / Sun, Chyi>
- 4. Un-Regulated Emissions from CRT-Equipped Transit Buses<Gibbs, Richard>
- 13. Un-Regulated Emissions from CRT-Equipped Transit Buses<Gibbs, Richard>
- 1. Facts about CNG and LPG Conversions
- 2. Staff Report: Initial Statement of Reasons - Proposed Regulation for a Public Transit Fleet Rule and Emission Standards for New Urban Buses
- 11. Staff Report: Initial Statement of Reasons - Proposed Regulation for a Public Transit Fleet Rule and Emission Standards for New Urban Buses
- w1. Summary of emission standards in various countries around the world
- 10. Sustainable Transport: New Insights From the IEAs Worldwide Transit Study<Fulton, Lew>
- 2. Air Pollution from Motor Vehicles - Standards and Technologies for Controlling Emissions<Faiz, Asiz / Walsh, Michael P. / Weaver, Christopher>
- 1. Air Pollution from Motor Vehicles - Standards and Technologies for Controlling Emissions<Faiz, Asiz / Walsh, Michael P. / Weaver, Christopher>
- 2. Status of Implementation of CNG as a Fuel for Urban Buses in Delhi<Dursbeck, Frank / Erlandsson, Lennart / Weaver, Christopher>
- ACEA data of the sulphur effect on advanced emission control technologies
- 7. World-Wide Fuel Charter
- 1. California's Heavy Duty Inspection Program
- 2. Diesel Emissions Factors and Control Measures For Colorado
- w2. Summary of emission standards in various countries around the world
- w3. Diesel Fuel and Engines: An Overview of New Emissions Regulations<Yacobucci, Brent D.>
- w4. Walsh CarLines
- w2. Europa: The Inspection of In-Use Cars in Order to Attain Minimum Emissions of Pollutants and Optimum Energy Efficiency
- w5. Colorado Department of Public Health and Environment: Air Pollution Control Division Mobile Sources Program
- w1. Snap Acceleration Smoke Test Procedure for Heavy Duty Powered Vehicles
- w3. Diesel Technology Forum: Diesel Smoke
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| Interesting websites | Institutions- A Comparative Analysis of the Feasibility and Cost of Compliance of Potential Future Emission Standards for Heavy Duty Vehicles Using Diesel or Natural Gas - Austin, Thomas C. / Delaney, Siona S. / Heirigs, Philip L. / Lyons, James M.
- Alliance of Automobile Manufacturers
- Analysis of Alternative Fuel Technologies for New York City Transit Buses - Sigall, Jonathan
- Cleaner Fuels Strategies - Yee, Gary
- Diesel Retrofit German Perspective - Friedrich, Axel
- European Automobile Manufacturers Association
- Global Trends in Diesel Emission Control - A 1999 Update - Walsh, Michael P.
- Older Gasoline Vehicles in Developing Countries and Economies in Transition: Their Importance and the Policy options for Addressing them - UNEP - United Nations Environment Programme
- Reuters.com: Cummins Truck Engine Wins Emissions OK
- Staff Report: Initial Statement of Reasons - Proposed Regulation for a Public Transit Fleet Rule and Emission Standards for New Urban Buses
- Walsh CarLines - Walsh, Michael P.
Information systems and databases- The De-NOx System - Tharmarajah, R.
- Un-Regulated Emissions from CRT-Equipped Transit Buses - Gibbs, Richard
- Urban Air Quality Management - Coordinating Transport, Environment, and Energy Policies in Developing Countries - Kojima, Masami / Lovei, Magda
Projects, programs and campaigns- California's Diesel Risk Reduction Program
- California's Heavy Duty Inspection Program
- Catalyst-Based Diesel Particulate Filters and NOx Adsorber: A Summary of the Technologies and the Effects of Fuel Sulfur
- Diesel Emission Control - Sulfur Effects (DECSE) Program - Final Report: Diesel Oxidation Catalysts and Lean-NOx Catalysts
- EU Emission Standards for Light Commercial Vehicles
- Heavy-Duty Diesel Emission Reduction Project Retrofit/Rebuild Component - US EPA
- Particulate Traps for Heavy Duty Vehicles - Mayer, A.
- Pollution from Diesel Vehicles - Worldwide Experiences with Aftertreatment Retrofit - Walsh, Michael P.
- Pollution from Diesel Vehicles - Worldwide Survey on Retrofit Catalyst Technology - Walsh, Michael P.
- Traffic, Transportation and Environment - Emission Legislation and Test System Requirements - Engeljehringer, Kurt / Preschern, Horst
- US Environmental Protection Agency Automobiles and Light Trucks
- Voluntary Diesel Retrofit Program: Clean diesel program
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