source: josm/trunk/test/data/renderer/way-dashes-clamp/style.mapcss

canvas {
    default-points: false;
    default-lines: false;
}

way[pattern] {
        width: 10;
        color: red;
        dashes: 20, 20;
        dashes-background-color: green;
        dashes-offset: 0;
}

way[pattern=B] {
        dashes-offset: 4;
}

way[pattern=C] {
        dashes-offset: 8;
}