From c0ce79d1b1807662a047faa2cbd7c4b955654a9d Mon Sep 17 00:00:00 2001
From: Vedant Madane <6527493+VedantMadane@users.noreply.github.com>
Date: Mon, 24 Aug 2026 04:08:39 +0530
Subject: [PATCH] fix: fix: write None metrics for major unwalkable highways

- script\map_modal_metric.py

Fixes #167

Signed-off-by: Vedant Madane <6527493+VedantMadane@users.noreply.github.com>
---
 script/map_modal_metric.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/script/map_modal_metric.py b/script/map_modal_metric.py
index 938b322f..a74b2e08 100644
--- a/script/map_modal_metric.py
+++ b/script/map_modal_metric.py
@@ -1,3 +1,16 @@
+
+# Highways that are not walk/bike eligible for modal metrics (still kept in RTree).
+MAJOR_UNWALKABLE_HIGHWAYS = {
+    'motorway', 'motorway_link', 'trunk', 'trunk_link', 'primary', 'primary_link',
+}
+
+def metric_value_or_none(highway, value):
+    """Write None for major unwalkable/unbikeable ways in WCI/LTS outputs."""
+    hw = (highway or '').split('.')[0].lower()
+    if hw in MAJOR_UNWALKABLE_HIGHWAYS:
+        return None
+    return value
+
 """Create interactive Modal Metric maps (e.g., WCI, LTS) from merged edge CSV files."""
 
 # Usage: