The specific route can be modified marginally by the participants; some will arrive earlier than others.

The routes were first introduced in September 1994 and have been modified since.

The route has not been modified since its designation.

In 1934, the route was modified at both ends.

In 1929, the route was modified to bypass the downtown areas.

Other routes were modified and/or will offer less frequent service in Missouri.

However, during the early 1960s the route was modified so as to provide an interchange with Highway 400.

In 2009 the route was modified to accommodate the more than 500 participants every month.

In addition, the route was modified only weeks before the festivities.

In 1953, the route was modified to follow its current alignment.