As mentioned earlier - NYC buses are sloooow. At least in Manhattan proper and I have never had one pose a problem. That said - I am always wary of large buses and trucks. When I was a kid growing up in San Francisco my least favorite bus driver on route to my High School crushed a pedestrian to death without even knowing it. Knowing that they can't see, can't maneuver well - I give them extra special attention by staying away from them at all costs.