diff --git a/subways_mod/init.lua b/subways_mod/init.lua
new file mode 100644
index 0000000..42a90dd
--- /dev/null
+++ b/subways_mod/init.lua
@@ -0,0 +1,10 @@
+-- twi_mods/subways_mod/init.lua
+-- Modify subways trains
+-- Copyright (c)  2025 1F616EMO
+-- SPDX-License-Identifier: AGPL-3.0-or-later
+
+-- Apply subway wagon door sound to 01700 series
+advtrains.wagon_prototypes["subways_01700_series:01700_series"].doors.open.sound =
+    advtrains.wagon_prototypes["advtrains:subway_wagon"].doors.open.sound
+advtrains.wagon_prototypes["subways_01700_series:01700_series"].doors.close.sound =
+    advtrains.wagon_prototypes["advtrains:subway_wagon"].doors.close.sound
diff --git a/subways_mod/mod.conf b/subways_mod/mod.conf
new file mode 100644
index 0000000..a06fe86
--- /dev/null
+++ b/subways_mod/mod.conf
@@ -0,0 +1,2 @@
+name = subways_mod
+depends = advtrains_train_subway, subways_01700_series