diff --git a/advtrains_interlocking/ars.lua b/advtrains_interlocking/ars.lua
index ef5d0da..5bb56fa 100644
--- a/advtrains_interlocking/ars.lua
+++ b/advtrains_interlocking/ars.lua
@@ -114,8 +114,16 @@ function advtrains.interlocking.ars_check(sigd, train)
 	local tcbs = il.db.get_tcbs(sigd)
 	if not tcbs or not tcbs.routes then return end
 	
+	if tcbs.ars_disabled then
+		-- No-ARS mode of signal.
+		-- ignore...
+		return
+	end
+	
 	if tcbs.routeset then
 		-- ARS is not in effect when a route is already set
+		-- just "punch" routesetting, just in case callback got lost.
+		minetest.after(0, il.route.update_route, sigd, tcbs, nil, nil)
 		return
 	end
 	
@@ -124,8 +132,5 @@ function advtrains.interlocking.ars_check(sigd, train)
 		--delay routesetting, it should not occur inside train step
 		-- using after here is OK because that gets called on every path recalculation
 		minetest.after(0, il.route.update_route, sigd, tcbs, rteid, nil)
-	else
-		-- just "punch" routesetting, just in case callback got lost.
-		minetest.after(0, il.route.update_route, sigd, tcbs, nil, nil)
 	end
 end
diff --git a/advtrains_interlocking/tcb_ts_ui.lua b/advtrains_interlocking/tcb_ts_ui.lua
index 4427a49..dca50da 100644
--- a/advtrains_interlocking/tcb_ts_ui.lua
+++ b/advtrains_interlocking/tcb_ts_ui.lua
@@ -605,12 +605,22 @@ function advtrains.interlocking.show_signalling_form(sigd, pname, sel_rte)
 				if hasprivs then
 					form = form.."button[3.5,7;2,1;editroute;Edit]"
 				end
+			else
+				if tcbs.ars_disabled then
+					form = form.."label[0.5,6  ;NOTE: ARS is disabled.]"
+					form = form.."label[0.5,6.5;Routes are not automatically set.]"
+				end
 			end
 			if hasprivs then
 				form = form.."button[0.5,8;2.5,1;newroute;New Route]"
 				form = form.."button[  3,8;2.5,1;unassign;Unassign Signal]"
 				form = form.."button[  3,9;2.5,1;influp;Influence Point]"
 			end
+			if tcbs.ars_disabled then
+				form = form.."button[0.5,9;2.5,1;arsenable;Enable ARS]"
+			else
+				form = form.."button[0.5,9;2.5,1;arsdisable;Disable ARS]"
+			end
 		elseif sigd_equal(tcbs.route_origin, sigd) then
 			-- something has gone wrong: tcbs.routeset should have been set...
 			form = form.."label[0.5,2.5;Inconsistent state: route_origin is same TCBS but no route set. Try again.]"
@@ -672,6 +682,9 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			tcbs.signal_name = fields.name
 		end
 		if tcbs.routeset and fields.cancelroute then
+			if tcbs.routes[tcbs.routeset] and tcbs.routes[tcbs.routeset].ars then
+				tcbs.ars_disabled = true
+			end
 			-- if route committed, cancel route ts info
 			ilrs.update_route(sigd, tcbs, nil, true)
 		end
@@ -720,6 +733,13 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			return
 		end
 		
+		if tcbs.ars_disabled and fields.arsenable then
+			tcbs.ars_disabled = nil
+		end
+		if not tcbs.ars_disabled and fields.arsdisable then
+			tcbs.ars_disabled = true
+		end
+		
 		if fields.auto then
 			tcbs.route_auto = true
 		end