diff --git a/3d/truck_town/vehicle.gd b/3d/truck_town/vehicle.gd
index 45870dac..4a27512e 100644
--- a/3d/truck_town/vehicle.gd
+++ b/3d/truck_town/vehicle.gd
@@ -10,6 +10,8 @@ var steer_target = 0
 export var engine_force_value = 40
 
 func _physics_process(delta):
+	var fwd_mps = transform.basis.xform_inv(linear_velocity).x
+	
 	if Input.is_action_pressed("ui_left"):
 		steer_target = STEER_LIMIT
 	elif Input.is_action_pressed("ui_right"):
@@ -23,7 +25,10 @@ func _physics_process(delta):
 		engine_force = 0
 	
 	if Input.is_action_pressed("ui_down"):
-		brake = 1
+		if (fwd_mps >= -1):
+			engine_force = -engine_force_value
+		else:
+			brake = 1
 	else:
 		brake = 0.0