WAY
highway=primary
oneway=yes

WAY 2
highway=secondary
oneway=-1

<<<lines>>>
highway=primary [0x2 road_class=2 road_speed=2]
highway=secondary [0x3 road_class=2 road_speed=2]

<<<results>>>
WAY 1: Road 0x2, labels=[null, null, null, null], res=24-24 oneway (1/1),(2/2), road class=2 speed=2
WAY 2: Road 0x3, labels=[null, null, null, null], res=24-24 oneway (2/2),(1/1), road class=2 speed=2
