Greening Demand Chains in Urban Passenger Transport: Emissions Saving from Complex Trip Chains
- 2.5k Downloads
It is well known that a significant amount to passenger trip activity involves multiple modes, destinations and trip purposes. For example, with multi-worker households, we observe a car commuter taking a child to a child care centre en route to work and also dropping their partner off at another location such as a railway station. This example is one of many trip chain configurations that represent the complexity of travel activity, and which have important implications on how we represent travel demand in transport planning models. What is not well understood is the impact that trip chaining has on greening the demand chain. We are unaware of any studies that have investigated the greening of passenger demand chains associated with the complexity of trip chains. This chapter uses the Sydney Household Travel Survey and an econometric model to identify the impact that the changing nature of trip chains has on CO2 emission. Results suggest that trip chains were stable in Sydney over a period of 15-year from 1997/98 to 2011/12. Emissions saving from chaining multiple activities into a single chain were found to vary between 5 and 19 % depending on whether the mode of travel is car, bus, or train.
KeywordsTrip chains Travel activity CO2 emission Transport modes Tour complexity Green travel demand
- Bradley, M., & Bowman, J. (2006). SACSIM/05 activity-based travel forecasting model for SACOG: Featuring DAYSIM—the person day activity and travel simulator. Technical memo number 4: Mode choice models. Prepared for Sacramento Area Council of Governments (SACOG).Google Scholar
- Cicillo, C., & Axhausen, K. (2002) Mode choice of complex tours. Association for European Transport (pp. 9–11). Cambridge, England.Google Scholar
- Davidson, W., Donnelly, R., Vovsha, P., Freedman, J., Ruegg, S., Hicks, J., et al. (2007). Synthesis of first practices and operational research approaches in activity-based travel demand modeling. Transportation Research Part A: Policy and Practice, 41, 464–488.Google Scholar
- Demographia. (2007). Greenhouse gas emission per passenger km: Australia. Available: www.demographia.com/db-australghg.pdf.
- Ho, C., & Mulley, C. (2013a). Multiple purposes at single destination: A key to a better understanding of the relationship between tour complexity and mode choice. Transportation Research Part A: Policy and Practice, 49, 206–219.Google Scholar
- Krygsman, S., Arentze, T., & Timmermans, H. (2007). Capturing tour mode and activity choice interdependencies: A co-evolutionary logit modelling approach. Transportation Research Part A: Policy and Practice, 41, 913–933.Google Scholar