diff --git a/class_mapping.txt b/class_mapping.txt
new file mode 100644
index 0000000..8779280
--- /dev/null
+++ b/class_mapping.txt
@@ -0,0 +1,7 @@
+1: continuous yellow
+2: continuous white
+3: dashed
+4: double dashed
+5: Botts' dots
+6: double continuous yellow
+7: unknown