Index: plugins/rt_topo/crbs_route.c
===================================================================
--- plugins/rt_topo/crbs_route.c	(revision 1408)
+++ plugins/rt_topo/crbs_route.c	(revision 1409)
@@ -54,7 +54,7 @@
 	dist = crbs_dist_heur(crbs->target->pt->x, crbs->target->pt->y, tx, ty);
 
  /* prefer concave over convex assuming the puller will get it shorter */
-	if ((from->type & 0x0F) == ADDR_ARC_CONCAVE)
+	if (((from->type & 0x0F) == ADDR_ARC_VCONCAVE) || ((from->type & 0x0F) == ADDR_ARC_CONCAVE))
 		dist = dist * 2 / 3;
 
 	return dist;
@@ -69,6 +69,7 @@
 	int from_dir = 0, to_dir = 0;
 
 	switch(from->type & 0x0F) {
+		case ADDR_ARC_VCONCAVE:
 		case ADDR_ARC_CONCAVE:
 			tune = 2.0/3.0; /* prefer concave over convex assuming the puller will get it shorter */
 		case ADDR_ARC_CONVEX:
@@ -86,6 +87,7 @@
 	}
 
 	switch(to->type & 0x0F) {
+		case ADDR_ARC_VCONCAVE:
 		case ADDR_ARC_CONCAVE:
 			tune = tune * (2.0/3.0);
 		case ADDR_ARC_CONVEX:
@@ -291,6 +293,7 @@
 		switch(curr->type & 0x0F) {
 			case ADDR_ARC_CONVEX:   from_type = (curr->new_adir > 0) ? "convex cw" : "convex ccw"; break;
 			case ADDR_ARC_CONCAVE:  from_type = (curr->new_adir > 0) ? "concave cw" : "concave ccw"; break;
+			case ADDR_ARC_VCONCAVE: from_type = "vconcave"; break;
 			case ADDR_POINT:        from_type = "incident"; break;
 			default:                from_type = "UNKNOWN"; break;
 		}
@@ -311,7 +314,7 @@
 		}
 
 
-		while(a->grbs_idx < 4) {
+		while(a->grbs_idx < 5) {
 			if (crbs_trace_ast) printf(" try from %s P%ld to P%ld", from_type, curr->pt->uid, pt->gpt->uid);
 
 			if (crbs->disable_concave) {
@@ -324,8 +327,9 @@
 			switch(a->grbs_idx) {
 				case 0: if (crbs_trace_ast) printf(" concave ccw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONCAVE_CCW); break;
 				case 1: if (crbs_trace_ast) printf(" concave cw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONCAVE_CW);  break;
-				case 2: if (crbs_trace_ast) printf(" convex ccw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CCW); break;
-				case 3: if (crbs_trace_ast) printf(" convex cw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CW); break;
+				case 2: if (crbs_trace_ast) printf(" vconcave"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_VCONCAVE); break;
+				case 3: if (crbs_trace_ast) printf(" convex ccw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CCW); break;
+				case 4: if (crbs_trace_ast) printf(" convex cw"); next = crbs_next_hop(crbs, curr, pt, GRBS_ADIR_CONVEX_CW); break;
 			}
 
 			a->grbs_idx++;
@@ -499,6 +503,7 @@
 			case GRBS_ADIR_CONVEX_CW:   printf(" cw P%ld", da->pt->uid); break;
 			case GRBS_ADIR_CONCAVE_CCW: printf(" concave ccw P%ld", da->pt->uid); break;
 			case GRBS_ADIR_CONCAVE_CW:  printf(" concave cw P%ld", da->pt->uid); break;
+			case GRBS_ADIR_VCONCAVE:    printf(" vconcave P%ld", da->pt->uid); break;
 		}
 		na = grbs_path_next(&crbs->grbs, crbs->routing_tn, pa, da->pt, da->user_long);
 		if (na != NULL) {
@@ -529,11 +534,13 @@
 	}
 
 	for(na = firsta; na != NULL; na = na->user_data) {
-		grbs_arc_t *arc = grbs_path_realize(&crbs->grbs, crbs->routing_tn, na, 0);
-		if (arc != NULL)
-			arc->user_data = ctn;
-		else
-			abort(); /* we have validated the path so this can not fail */
+		if ((na->type & 0x0F) != ADDR_ARC_VCONCAVE) {
+			grbs_arc_t *arc = grbs_path_realize(&crbs->grbs, crbs->routing_tn, na, 0);
+			if (arc != NULL)
+				arc->user_data = ctn;
+			else
+				abort(); /* we have validated the path so this can not fail */
+		}
 	}
 
 	{