idk i'm usually going at about ~25km/h on flats which I don't think is that bad. Certaintly not so that the bus should be honking behind me for a good block or two.. Plus keeping to the shoulder when there's cars behind me..
even then, what happened to bus drivers being friendly? I don't mind cars being *******s going 80kmh but buses on roads with a 50kmh speed limit? Beats me, especially seeing how they have to stop every two or three blocks..