diff --git a/advtrains_mod/init.lua b/advtrains_mod/init.lua
new file mode 100644
index 0000000..b22a17d
--- /dev/null
+++ b/advtrains_mod/init.lua
@@ -0,0 +1,18 @@
+-- twi_mods/advtrains_mod/init.lua
+-- Modify advtrains_interlocking
+-- Copyright (C) 2024  1F616EMO
+-- SPDX-License-Identifier: AGPL-3.0-or-later
+
+if not core.instrument_function then return end
+
+for _, name in ipairs({
+    "train_ensure_init",
+    "train_step_b",
+    "train_step_c",
+}) do
+    advtrains[name] = core.instrument_function({
+        func = advtrains[name],
+        class = "Trainlogic",
+        label = name
+    })
+end
diff --git a/advtrains_mod/mod.conf b/advtrains_mod/mod.conf
new file mode 100644
index 0000000..a4fefba
--- /dev/null
+++ b/advtrains_mod/mod.conf
@@ -0,0 +1,2 @@
+name = advtrains_mod
+depends = advtrains