diff --git a/flax/subs/runway b/flax/subs/runway
new file mode 100644
--- /dev/null
+++ b/flax/subs/runway
@@ -0,0 +1,9 @@
+ramp0-stairs : 1.0
+ramp1 : 1.0
+ramp2 : 1.0
+ramp3 : 1.0
+ramp4 : 1.0
+ramp5 : 1.0
+ramp6 : 1.0
+ramp7 : 1.0
+ramp8 : 1.0