이 혼잡 통행료가 처음에는 시범적으로 도입된 것이어서, 1월에 시작했다가 시민 투표 결과에 따라 7월 말에 다시 폐지되었습니다. 그러다가 2007년에 다시 도입되었습니다. 이것은 물론 놀라운 과학적 실험의 기회가 되었답니다.
Well, the thing is that, the congestion charges, they were introduced first as a trial, so they were introduced in January and then abolished again at the end of July, followed by a referendum, and then they were reintroduced again in 2007, which of course was a wonderful scientific opportunity.