diff --git a/tm2py/components/network/transit/transit_assign.py b/tm2py/components/network/transit/transit_assign.py
index 056e624e..ef287d58 100644
--- a/tm2py/components/network/transit/transit_assign.py
+++ b/tm2py/components/network/transit/transit_assign.py
@@ -168,7 +168,7 @@ def calc_segment_cost(transit_volume: float, capacity, segment) -> float:
             mode_char = line.mode.id
 
         if mode_char in ["p"]:
-            congestion = 0.25 * ((transit_volume / capacity) ** 8)
+            congestion = 0.25 * ((transit_volume / capacity) ** 10)
         else:
             seated_capacity = (
                 line.vehicle.seated_capacity