Most transportation cases can eventually be reduced to tic-tac-toe. Along the way, there are thousands of variables to sort through. It is the expert’s responsibility to know and understand them, to quickly rule out those unlikely to matter, and to streamline those which do into tight, usable, understandable, clear points. It is the expert’s job to identify the evidence likely to yield the most benefits, as well as those which suggest caution. It is the expert’s job to help explain why certain things matter. And it is the expert’s job to identify the commercial, political and institutional dynamics related to the case and the subject matter in which the case lives. Finally, it is the expert’s job to identify the many choices counsel often has for extracting the most value points from the evidence and the context surrounding it.