The ornamental design for a roadwaymarker, as shown and described.
FIG. 1 is a front right perspective view of a first embodiment of a roadway marker showing my new design;
FIG. 2 is a front elevation view thereof, the rear elevation view being identical thereto;
FIG. 3 is a left side view thereof, the right side view being identical thereto;
FIG. 4 is a top plan view thereof;
FIG. 5 is a front right perspective view of the second embodiment of a roadway marker showing my new design;
FIG. 6 is a front elevation view thereof, the rear elevation view being identical thereto;
FIG. 7 is a left side view thereof, the right side being identical thereto; and,
FIG. 8 is a top plan view thereof.
The broken lines shown in the drawings illustrate portions of the roadway marker that form no part of the claimed design. The bottom view of the roadway marker is not visible during ordinary use and forms no part of the claimed design.