@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("SimpleTrain [ID = " + getId() + ", Number = " + getNumber()
				+ "]: {\n");
		for (AbstractCarriage ac : this) {
			sb.append("  " + ac + "\n");
		}
		sb.append("}\n");
		return sb.toString();
	}