Pickup zones wait till you've come to a stop.

Source/CrazyAmbulance/Private/VehicleNew.cpp

···
 
 	bool bTouchingGround = false;
 	bool bBothFrontWheelsTouchingGround = true;
+	CurrentSpeed = 0.0;
 	for (int i = 0; i < 4; ++i)
 	{
 		bool FrontWheel = i / 2 == 0;
···
 			DrawDebugCircle(GetWorld(), TireCenter, TireRadius, 20, FColor::Green, false, -1, 0, 0, TireForward);
 
 			FVector TireVelocity = Body->GetPhysicsLinearVelocityAtPoint(TireCenter);
+			CurrentSpeed += TireVelocity.Size();
 
 			// Suspension
 			double Offset = SuspensionRestDist - (Result.Distance - TireRadius);
···
 			}
 		}
 	}
+
+	CurrentSpeed /= 4.0;
 
 	if (!bTouchingGround)
 	{

Source/CrazyAmbulance/Public/VehicleNew.h

···
 	UPROPERTY(EditAnywhere)
 	double EBrakeFrontSteerMultiplier = 0.5;
 
+	UPROPERTY(BlueprintReadOnly)
+	double CurrentSpeed;
+
 private:
 	bool bEBrakeOn = false;
 	double EBrakeSteeringAngle;