Quantitative Analysis of Pollutant Emissions in the Context of Demand Responsive Transport
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Quantitative Analysis of Pollutant Emissions in the Context of Demand Responsive Transport Julie Prud'homme, Didier Josselin, Jagannath Aryal - University of Avignon
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Quantitative Analysis of Pollutant Emissions in the Context of Demand Responsive Transport
- 1. Pollutant Emissions and DRT Systems Towards the Integration of a Spatial Dimension in the Estimations Julie Prud’homme, Didier Josselin, JagannathAryal julie.prud-homme@etd.univ-avignon.fr UMR ESPACE – CNRS 6012 – University of Avignon
- 2. Outline Introduction Simulation and results Conclusions 2
- 3. Introduction
- 4. Cumul des émissions 4
- 5. 5
- 6. 6
- 7. 7
- 8. 8
- 9. 9
- 10. 10
- 11. 11
- 12. 12
- 13. 13
- 14. Emission Models MEET (Methodology of Emission Estimation from Transports) set up at the conclusion of an European collaboration [J.Hickmanet al. (2003)] GREEN-DRT model (Geographical Reasoning on Emission Estimation from transports based on road Network shape) adapted from MEET [J.Prud’homme (2011)] 14
- 15. Calculation of Start Emissions 15
- 16. Consideration of the Road Network in the Calculation of Emissions in Traffic 16
- 17. 17
- 18. 18 Calculation of Unit Emissions A fair repartition of emissions EC2= ES4/2 + ES5+ (ES1 + ES2 + ES6 )/2 Emissions in service Cumulative emissions S1 S2 S3 S4 S5 S6 Emissions without client Sections of journey Effective emissions EC1= ES3+ ES4/2 +(ES1 + ES2 + ES6 )/2
- 20. Workflow of GREEN-DRT Model 20
- 21. 21 Simulations
- 22. Simulations Simulation of a DRT in three different scales (different density of stops) 22 Level 1 : Britany 34 stops ; 0.0013 stop/km² Scale = 1:7500000 Level 2 : Agglomeration of Rennes 33 stops ; 0.054 stop/km² Scale = 1:800000 Level 3 : City of Rennes 79 stops ; 1.58 stop/km² Scale = 1:130000
- 23. Simulations Scalability(number of client demands) Grouping rate (deviation time allowed) Unlimited number of vehicle in fleet 50% gasoline, 50% diesel 23
- 24. Results y = 29,47x-1,298 R² = 0,7953 y = 47,559x-1,411 R² = 0,7356 Confirmation of a reduced vehicles number and emissions with the increased grouping rate 24 Grouping average in actual DRT services in Europe 1,3 2 1,3 2
- 28. increase of distance travelled by vehicles
- 29. dependent on characteristics of the road network « environmental » threshold 28
- 30. Pollutant Emissions and DRT Systems Towards the Integration of a Spatial Dimension in the Estimations Julie Prud’homme, Didier Josselin, JagannathAryal julie.prud-homme@etd.univ-avignon.fr UMR ESPACE – CNRS 6012 – University of Avignon