I will draft whatever I can if I am familiar with the road and traffic pattern. Chevy Sonic to a UPS truck and everything in between. Bus? Cement mixer? 18 wheeler? Sure. The only thing I avoid drafting is an armored truck like Brinks. Really don't want the driver to catch a glimpse of me hanging back on his truck. Not only have I drafted....I have grabbed on as well for a second off a light. It was a trolley style bus and there just happened to be a perfect spot for me to grab onto, so I did.