In the sport of triathlon the Transition Area is like the hub in the center of a wheel with the swim, bike, and run like wheel spokes. The athlete passes through the Transition Area twice in the event. In the Transition Area the athlete moves from swimming to biking and then from biking to running.
Every athlete has a spot in the Transition Area where his/her bike, helmet, shoes/socks, shirt, shorts, towel and other needed stuff is located. The triathlon begins at the pool. Following the swim the athlete moves to the Transition Area where he/she removes any swim equipment such as goggles, quickly dries off, puts on what is needed for the bike ride, takes his/her bike and (walking the bike) exits the Transition Area following the sign that says Bike Out. Bathing suit removal is not permitted. Athletes put on shorts and a shirt over their bathing suit with their race number pinned on in advance. Some athletes just put on a shirt (with number) and ride with bathing suits instead of shorts-over-suits.
After the ride, the athlete returns to the Transition Area and (walking the bike) goes back to where his/her equipment is located. The bike is placed in the rack, helmet and other riding equipment is removed, and the athlete prepares for the run. Runners may jog to the Run Out sign in the Transition Area, watching for bikes and other runners.
A few notes on the Transition Area: