From 395b89d0a13b6c27d91adcdc666d3ad66a99e367 Mon Sep 17 00:00:00 2001
From: kevinz000 <2003111+kevinz000@users.noreply.github.com>
Date: Sun, 14 Jul 2019 03:42:26 -0700
Subject: [PATCH] Update RPD.dm

---
 code/game/objects/items/RPD.dm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/code/game/objects/items/RPD.dm b/code/game/objects/items/RPD.dm
index 6dbf0c2ad3..1dbdb4efe0 100644
--- a/code/game/objects/items/RPD.dm
+++ b/code/game/objects/items/RPD.dm
@@ -435,6 +435,10 @@ GLOBAL_LIST_INIT(transit_tube_recipes, list(
 				to_chat(user, "<span class='notice'>You start building a transit tube...</span>")
 				playsound(get_turf(src), 'sound/machines/click.ogg', 50, 1)
 				if(do_after(user, transit_build_speed, target = A))
+					for(var/obj/structure/c_transit_tube/tube in A)
+						if(tube.dir == queued_p_dir || (queued_p_flipped && (tube.dir == turn(queued_p_dir, 45))))
+							to_chat(user, "<span class='warning'>[src]'s error light flickers; there's already a pipe in the way!</span>")
+							return
 					activate()
 					if(queued_p_type == /obj/structure/c_transit_tube_pod)
 						var/obj/structure/c_transit_tube_pod/pod = new /obj/structure/c_transit_tube_pod(A)