The ornamental design for a roadwaysignlightbracket, as shown and described.
FIG. 1 is a perspective view of a roadway sign light bracket showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a top plan thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a rear elevation view thereof; and,
FIG. 6 is a right side elevation view thereof, the left side elevation view being a mirror image.
The broken line showing in FIGS. 1–6 is for the purpose of illustrating a possible accessory mounting configuration, and forms no part of the claimed design.