Never mind my tier category comment. It was correct although some R roads have expressway standard

.
In addition, I think you've just mapped B roads which are expressway like, haven't you?
Nevertheless, I've checked the available routes:
BEL B501 new RueVerPat (50.460465,3.945711)
BEL R4 E40 should be renamed to B403
BEL R4 HunWeg should be renamed to N444
BEL R6 ends at N15 (
http://routes.wikia.com/wiki/Ring_belge_R6)
- BEL R6 new N15 (51.037373,4.564390)
BEL R9 all waypoints are wrong (
http://routes.wikia.com/wiki/Ring_belge_R9)
BEL E420 I think E420 waypoints 13 to 21 are wrong, please refer to R9
BEL R10 A1 should be renamed to N155 because the waypoint is not similar to the A1 waypoint
BEL R10 A13 should be renamed to N12_W because the waypoint is not similar to the A1 waypoint
BEL R10 N12 should be renamed to N12_E
BEL R14 Goo should be renamed and moved to N19g (51.181172,4.973158)
BEL R21 AveGeoHen should be removed because there are no ramps
BEL R32 KanSt should be renamed to HonSt (wrong name)
BEL R33 It seems that a new section has been opened:
- BEL R33 new KroWeg (50.864342,2.717769)
BEL R53 N573 location is odd. It would move the waypoint to the roundabout and call it N573 (50.401279,4.529382)
BEL R70 all waypoints are wrong
Some additional routes might be missing...