Oxford Road is an utter nightmare and tbh this sort of thing needs to be done there- it's not a good advert for cycling at all.
I work on Oxford Road and have seen at least three pedestrians pole-axed by red light jumpers when crossing the road. One of them an old lady who looked in a very bad way afterwards. Also lost count of the times I've seen people being rescued from underneath buses.
It's a major student route so there really is a large volume of people on bikes (wouldn't really call them 'cyclists') of the type who give everyone else a bad name. It's also (or once was) the busiest bus route in Europe.
I don't even know why people bother using large parts that route anyway as it's much easier to go through moss-side or several other alternative routes.