The ornamental design for a playmat with self-aligning roads, as shown and described.
FIG. 1 illustrates a perspective, side view of a play mat with self-aligning roads;
FIG. 2 illustrates a top view of a play mat with self-aligning roads;
FIG. 3 illustrates a side view of a play mat with self-aligning roads;
FIG. 4 illustrates side view of a play mat with self-aligning roads;
FIG. 5 illustrates an exploded, perspective, side view of a play mat with self-aligning roads;
FIG. 6 illustrates an exploded, side view of a play mat with self-aligning roads; and,
FIG. 7 illustrates an exploded, side view of a play mat with self-aligning roads.
The broken lines in the drawings depicting the puzzle piece breaks between adjoining puzzle pieces form no part of the claimed design. Additionally, the broken lines within each of the roads depict road lane markings and form part of the claim.