I am working with the Ordnance Survey ITN layer for the UK road network in ArcGIS. Unfortunately, whilst it has many attributes, speed limits is not one of them.
I have produced roughly accurate speed limits based on the attributes provided, i.e.
DescTerm = A Road
Nature = Single Carriageway
Speed would equal 60mph.
Whilst this is roughly right, in reality, many roads have reduced speed limits through towns etc. OpenStreetMap data has speed limits within it and I would like to bring these across to the ITN layer data. The roads roughly line up but are not always perfect.
I envisage that ArcGIS would somehow snap one road to another and then, with code, bring across the appropriate attributes.
I am looking for some assistance in where to begin with this.