Would it be feasible to process overlays directly in the "lines" file?

Instead of

'highway=trunk & oneway=yes [0x123 road_class=3 road_speed=5 resolution 16]'

in the "lines" file and 

'0x123:   0x02, 0x23' in the "overlays" file, how about

'highway=trunk & oneway=yes [0x02, 0x23 road_class=3 road_speed=5 resolution 16]'

This would remove the need for an "overlays" file and for a dummy code for each overlaid feature.

Roger

Roger Calvert