diff --git a/Configuration-file.md b/Configuration-file.md
index 20585c4..4282ab4 100644
--- a/Configuration-file.md
+++ b/Configuration-file.md
@@ -41,5 +41,5 @@ You can also use -ref option in shell command.
 * limit_speed_mode / speed_rf : The maximum speed in a too polluted area will be multiplied by a factor defined by 'speed_rf'. 
 * adjust_traffic_light_mode / trafficLights_duration_rf : The duration of the traffic lights will be multiplied by a factor defined by 'trafficLights_duration_rf'.
 
-* weight_routing_mode (HEAVY) : When an area exceeds the threshold, this mode affects all traffic lanes by assigning them a "weight" corresponding to pollutant emissions on that lane. This mode is not recommended because it requires more computing time and it's less efficient. 
+* weight_routing_mode : When an area exceeds the threshold, this mode affects all traffic lanes by assigning them a "weight" corresponding to pollutant emissions on that lane. This mode is not recommended because it requires more computing time and it's less efficient. 
 * lock_area_mode (NOT FIXED) : Blocks an area that is too polluted to vehicles. This mode is not recommended because it is not fixed.