diff --git a/advtrains/trainlogic.lua b/advtrains/trainlogic.lua
index 0fb778b..7093929 100644
--- a/advtrains/trainlogic.lua
+++ b/advtrains/trainlogic.lua
@@ -1369,43 +1369,16 @@ end
 
 --not blocking trains group
 function advtrains.train_collides(node)
-	if node and minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].walkable then
-		if not minetest.registered_nodes[node.name].groups.not_blocking_trains then
+	if node and minetest.registered_nodes[node.name] then
+		local ndef = minetest.registered_nodes[node.name]
+		-- if the node is drawtype normal (that is a full cube) then it does collide
+		if ndef.drawtype == "normal" then
+			-- except if it is not_blocking_trains
+			if ndef.groups.not_blocking_trains and ndef.groups.not_blocking_trains ~= 0 then
+				return false
+			end
 			return true
 		end
 	end
 	return false
 end
-
-local nonblocknodes={
-	"default:fence_wood",
-	"default:fence_acacia_wood",
-	"default:fence_aspen_wood",
-	"default:fence_pine_wood",
-	"default:fence_junglewood",
-	"default:torch",
-	"bones:bones",
-	
-	"default:sign_wall",
-	"signs:sign_wall",
-	"signs:sign_wall_blue",
-	"signs:sign_wall_brown",
-	"signs:sign_wall_orange",
-	"signs:sign_wall_green",
-	"signs:sign_yard",
-	"signs:sign_wall_white_black",
-	"signs:sign_wall_red",
-	"signs:sign_wall_white_red",
-	"signs:sign_wall_yellow",
-	"signs:sign_post",
-	"signs:sign_hanging",
-	
-	
-}
-minetest.after(0, function()
-	for _,name in ipairs(nonblocknodes) do
-		if minetest.registered_nodes[name] then
-			minetest.registered_nodes[name].groups.not_blocking_trains=1
-		end
-	end
-end)