It seems like your trying to create a spatial matrix on your road layer from other intersecting layers. To populate the road layer you will need to perform either a combination of Join Attribute by Location, Spatial Query, or Union.
Spatial Query - will select one table features based on spatial intersection parameter. You may find the tool in the Vector menu>Spatial Query>Spatial Query.
Join Attribute by Location - will join the two tables together based on spatial intersection. You may find the tool in the Vector menu>Data Management>Join Attribute by Location.
Union - You should be mindful of that the joining of spatial data between polyline and polygon data is not always a one to one relationship, since sometimes polyline features overlap polygon features. Union tool is located in the Vector menu>Geoprocessing Tools>Union.
With each method you will most likely have to clean up your final database eliminating un-wanted fields and devising a matrix schema for each criteria (or field) that may add up to the total classified field (summation of the other criteria fields).