@article{JRC111969,
	address = {Ispra (Italy)},
	year = {2018},
	author = {Condeco Melhorado AM and Christidis P and Dijkstra L},
	publisher = {European Commission},
	abstract = {Historical road networks in Europe: Shapefiles including the correct geometry and speed of the European road networks from 1960. 
		Methodological description and application in:
		Condeço-Melhorado, A. M., Christidis, P., & Dijkstra, L. (2015). Travel speed changes along the European core road network for the period 1960–2030: An application of octilinear cartograms. Journal of Maps, (November), 1–4. doi:10.1080/17445647.2015.1088482 doi: 10.1080/17445647.2015.1088482
		
		Three classes of roads (1,2,3), class 1 being highways. Six time periods: 2012, 2000, 1990, 1980, 1970 and 1955 
		Field NCLASS_xxx is the class of the road in each year (last xxx digits) 
		Travel time is the time (in minutes) to travel the distance (shape_length, in meters) at the speed of the class the road has in 2012.
		},
	title = {Replication Data for: Travel speed changes along the European core road network for the period 1960–2030: an application of octilinear cartograms},
	url = {https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/INFPSE},
	doi = {10.7910/DVN/INF