What drives the allocation of motorways? Evidence from Portugal’s fast-expanding network

Bruno Rocha, Nuno Afonso, Patricia Melo and João de Abreu e Silva

No 2021/0184, Working Papers REM from ISEG - Lisbon School of Economics and Management, REM, Universidade de Lisboa

Abstract: This study investigates the factors that influenced the allocation of motorways across municipalities in mainland Portugal over the period from 1981 to 2011. Our analysis, based on Poisson Pseudo-maximum Likelihood models, suggests that population size and market potential in 1981 are important determinants of motorway density in 2011. Likewise, physical and geographical variables also help explain the spatial distribution of motorway investment, as terrain ruggedness, distance to the coast, and distance to the border with Spain are negatively associated with motorway density. In addition, we consider the influence of the proximity to historical and pre-existing transport networks on the allocation of motorways; we find that municipalities that are closer to the 1800’s itineraries, the main roads of the 1945’s National Road Plan, and 1981’s train stations appear to have higher motorway densities in 2011, but this effect is concentrated in the vast and sparsely populated area of the country that excludes what we term the highdensity Portuguese “blue banana”. Interestingly, it is also only in this low-density region that partisan alignment between the municipal and the national levels of government appears to affect the allocation of transport investment, which suggests that motorways are more of a political asset in more remote or less urbanised areas.

Date: 2021-07
New Economics Papers: this item is included in nep-geo, nep-tre and nep-ure
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Citations: View citations in EconPapers (1)

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Journal Article: What drives the allocation of motorways? Evidence from Portugal's fast-expanding network (2022)
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