They've done it because there is zero transport budget so the only way to release gridlock in manchester is to improve public transport at the expense of the car. I love what they have done on the Oxford Rd corridor. It suits me, but it's at the expense of cars. They want people to migrate from cars to other modes of transport. It works if you live in Manchester, but it might be short termist because I have noticed a lot less shoppers in Manchester. That maybe down to other effects though i.e. the Internet where stuff comes to you rather you go to town.