The London Road network data set is produced by the UK Ordnance Survey (OS) in 2001.
data(LNNT)A “SpatialLinesDataFrame” object named “LN.nt”.
In this data set, roads are categorized into four types (nt_RoadTyp):
Mo: motorway
a: A-road
b: B-road
Mi: minor road
Speed limit for each road segment is also incoporated in the attribute “Speed” (Transport for London, 2011)
Lu, B., M. Charlton, P. Harris & A. S. Fotheringham (2014) Geographically weighted regression with a non-Euclidean distance metric: a case study using hedonic house price data. International Journal of Geographical Information Science, 28, 660-681.
Transport for London, (2011) Intelligent Speed Adaptation [online]. http://www.tfl.gov.uk/corporate/projectsandschemes/7893.aspx#For_developers. Available from: http://www.tfl.gov.uk/corporate/projectsandschemes/7893.aspx#For_developers.