When you ride in Swanston St, you accept that trams, taxis and delivery vans are part of the deal. But the bloody tourist coaches are a major inconvenience to all other users on that street and they increase the risks for cyclists.
But the worst thing is that they are often illegally parked in no standing zones and right on corners, presumably because their passengers (fat-arsed tourists and equally fat-arsed bogans on shopping tours) think themselves incapable of walking more than ten paces.
There's no doubt that traffic flow on Swanston St would be greatly improved if tourist coaches weren't there.