Linking inequalities in daily mobility and transport expenditure in a Latin-American metropolis
Résumé
In metropolitan areas that are experiencing marked spatial growth, access to activities and resources afforded by the city is far from universal. This is primarily due to socio-geographical disparities in the distribution of urban services and jobs. However, in cities of the global South the situation is further worsened by major inequalities in the use of motorized transport modes, not only cars but also public transport which is too expensive for poor city-dwellers to use on a regular basis. In order to take better account of socio-spatial equity issues and improve accessibility to urban resources and opportunities, it is necessary to strengthen our knowledge on mobility inequalities taking into account simultaneously transport expenditure and levels of mobility. We analyze data from two household surveys undertaken in 2007-2008 in the metropolitan zone of Guadalajara, the second biggest Mexican conurbation with more than 4 million inhabitants, to estimate inequalities in daily mobility and transport expenditure. We assess the impact of the equivalence scale on the measure of inequalities. Expenditure and travel behavior indicators are then analyzed according to income level and place of residence. The results highlight the fact that transport is a major component of household expenditure and that there are considerable inequalities between households. Even though regular use of motorized transport is unaffordable for poor populations, they are not totally excluded from motorized mobility due to the diversity of types of public transport. The inhabitants of the most distant zones have to make trade-offs between a high proportion of transport expenditure in their budget and daily mobility restricted to the residential neighborhood.
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