I couldn't imagine being a city bus driver. Dealing with traffic on the outside that doesn't want to let you in, then dealing with the passengers on the inside.
The turn signal showing the bus was going to merge in was clearly flashing when Crash_It intentionally sped up. Being that he edited it to show very minimal time here (yet, shows a LOT of time near the end before he makes his right), means that the bus probably had that signal flashing for a longer period of time, and Crash_It probably sped up more than shown, in order to recklessly attempt to impede a transit buses' movement.