diff --git a/warehouse/models/mart/ntd/_mart_ntd.yml b/warehouse/models/mart/ntd/_mart_ntd.yml
index 7723c12b72..8a7b35a02e 100644
--- a/warehouse/models/mart/ntd/_mart_ntd.yml
+++ b/warehouse/models/mart/ntd/_mart_ntd.yml
@@ -68,6 +68,8 @@ models:
         description: The mode of service operated under the contract. A contractor can
           operate more than one mode/TOS under a contract (only one B-30 for
           that contractor).
+      - name: service_type
+        description: A summarization of modes into Fixed Route and Demand Response
       - name: tos
         description: The type of service operated under the contract.
       - name: time_period
diff --git a/warehouse/models/mart/ntd/dim_monthly_ntd_ridership_with_adjustments.sql b/warehouse/models/mart/ntd/dim_monthly_ntd_ridership_with_adjustments.sql
index 37a58d49c0..eab3342983 100644
--- a/warehouse/models/mart/ntd/dim_monthly_ntd_ridership_with_adjustments.sql
+++ b/warehouse/models/mart/ntd/dim_monthly_ntd_ridership_with_adjustments.sql
@@ -14,6 +14,11 @@ select
     agency,
     mode_type_of_service_status,
     mode,
+    CASE
+        WHEN mode IN ('AR', 'CC', 'CR', 'HR', 'YR', 'IP', 'LR', 'MG', 'SR', 'TR', 'MB', 'RB', 'CB', 'TB', 'FB', 'IP') THEN 'Fixed Route'
+        WHEN mode IN ('DR', 'DT', 'VP', 'JT', 'PB') THEN 'Demand Response'
+        ELSE 'Unknown' -- mode is null sometimes
+    END AS service_type,
     _3_mode,
     tos,
     legacy_ntd_id,