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This paper uses detailed survey data to show no evidence of an Environmental Kuznets Curve (EKC) for household transport emissions. The evidence shows that richer households still do not choose to internalize the social cost of polluting by vehicle emissions

Spatial planning and policy continues to be used as a tool to bring about changes in travel behavior. Policy suggests that by creating particular urban forms, demand for travel by car can be reduced. This paper uses data collected in 2006 from 280 households in Glasgow and Edinburgh to analyze the relationships between urban form and vehicle miles driven, with an emphasis on those who had recently relocated. Population densities, housing type, distance to urban center, and measures of mix were collected for the current residential location and prior residence for those who had relocated in the previous three years. An ordinal regression model of change in urban form showed significant associations with reported change in miles driven, although the effect was small compared with the effects of socioeconomic factors and car ownership. While the results give some weight to intensification as a policy to bring about a reduction in average distance driven, there may be an increase in total distance driven in the intensified area with a corresponding increase in congestion. Whether such intensification can be enacted against a backdrop of preferences toward suburban, car-oriented living is contentious. As such, this study calls into question the use of planning policy as a means to reduce car use in Scottish cities.

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This paper describes the impact of the Portsmouth "Big Green Commuter Challenge" (BGCC) event, organized by Portsmouth City Council (PCC) in order to reduce carbon and nitrogen oxide emissions from transport within the city. In total, over 1000 people and 36 organizations took part in the 2011 event. This is an example of a 'Smarter Choice" measure designed to encourage travel behavioral change to more sustainable modes of transport. A literature review and evaluation of previous "Smarter Choices" measures has been carried out to give some context to the BGCC. An introduction to the city of Portsmouth is presented, in particular its efforts to reduce road traffic and emissions from the city centre area. The event encouraged a modal shift to more sustainable modes of travel, resulting in estimated reductions in CO 2 and NO x emissions per mile. However, a number of further recommendations have been made to enable future similar events to have a greater impact on road traffic and emissions.

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