@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Vehicle other = (Vehicle) obj;
		if (horizontal != other.horizontal)
			return false;
		if (identifier != other.identifier)
			return false;
		if (length != other.length)
			return false;
		if (position == null) {
			if (other.position != null)
				return false;
		} else if (!position.equals(other.position))
			return false;
		return true;
	}