Racing Database Design Inquiry

[eluser]zimco[/eluser]
Many thanks to all for the thoughtful responses. Each of you has pointed out some things i had not considered until you mentioned it, and have helped me to make better decisions for the database design.

--webthink special thanks for pointing out the lack of necessity for the car_scores table; as i was debating whether i really needed it or not as the database should not exceed 200 cars and i would think the server should be able to query and do the calculations relatively fast on such a small number. However, the database design books i've been reading lately always seem to prefer having the extra table rather than putting it in a column of the cars table, like you proposed.