Roof structure for a passenger bus

FIG. 1 is a top, front, and right side perspective view of a roof structure for a passenger bus showing our new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a top, front, and right side perspective view of a second embodiment of a roof structure for a passenger bus showing our new design; and,

FIG. 4 is a right side elevation view of the embodiment shown in FIG. 3 .

Views not shown in the Figures are either not part of the claimed design or are mirror images of those shown. Broken lines are intended to show environments in which the designs may be used and are not intended to form a part of the claimed design.