Sentence:  The president rides adjacent to, and to the right side of, the <WSD>road captain</WSD>. The 'prez' and 'captain' are followed by the other members of the executive. Next in the column ride the rest of the patch holders, followed by the strikers, friends of the club, and assorted guests. At the rear of the column ride the two assistant <WSD>road captains</WSD>. 
Meaning of the word marked with <WSD> tags:  An experienced rider who organizes and marshals the motorcycle club on the road.