diff --git a/src/av2/datasets/motion_forecasting/constants.py b/src/av2/datasets/motion_forecasting/constants.py
index 84f72c3b9..19795b3ed 100644
--- a/src/av2/datasets/motion_forecasting/constants.py
+++ b/src/av2/datasets/motion_forecasting/constants.py
@@ -4,6 +4,7 @@
 
 from typing import Final
 
-AV2_SCENARIO_OBS_TIMESTEPS: Final[int] = 60
+AV2_SCENARIO_STEP_HZ: Final[int] = 10
+AV2_SCENARIO_OBS_TIMESTEPS: Final[int] = 50
 AV2_SCENARIO_PRED_TIMESTEPS: Final[int] = 60
 AV2_SCENARIO_TOTAL_TIMESTEPS: Final[int] = 110