From a42bcde384ad6b7a4fedf61dd856b2b1745e09f6 Mon Sep 17 00:00:00 2001
From: miles-grant-ibigroup <miles.grant@ibigroup.com>
Date: Mon, 19 Dec 2022 15:12:51 -0500
Subject: [PATCH] fix(core-utils): adjust baseline co2 calculation algorithm

---
 packages/core-utils/src/itinerary.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/core-utils/src/itinerary.ts b/packages/core-utils/src/itinerary.ts
index ab31d56e2..090643af9 100644
--- a/packages/core-utils/src/itinerary.ts
+++ b/packages/core-utils/src/itinerary.ts
@@ -521,8 +521,10 @@ export function calculateEmissions(
   const totalCarbon =
     itinerary?.legs?.reduce((total, leg) => {
       return (
-        (leg.distance * carbonIntensityWithDefaults[leg.mode.toLowerCase()] ||
-          0) + total
+        // We estimate that the actual driving distance is 1.34x the "crow-flying" distance
+        (leg.distance *
+          1.34 *
+          carbonIntensityWithDefaults[leg.mode.toLowerCase()] || 0) + total
       );
     }, 0) || 0;