\"Another benefit is that charts at Trakus tracks will no longer a matter of guesswork. Currently, with the exception of the finish call, running lines are compiled by a person, who estimates the distance between each horse. A horse that the chartmaker believes is three lengths behind the leader could actually be four lengths behind. With Trakus, that sort of mistake can\'t happen. Trakus will also be able to tell people compiling data exactly how far from the inner rail a horse was racing on the turns, something that should prove useful for the companies that put out the speed figure sheets.\"
http://sports.espn.go.com/sports/horse/columns/story?columnist=finley_bill&id=2588960