Leaflet Try It Now Routing Optimized

var map,
                    dir;

map = L.map('map', {
                    layers: MQ.mapLayer(),
                    center: [ 42.658694, -73.602323 ],
                    zoom: 7
                });

dir = MQ.routing.directions();

dir.optimizedRoute({
                    locations: [
                        'syracuse ny',
                        'springfield ma',
                        'ithaca ny',
                        'hartford ct'
                    ]
                });

map.addLayer(MQ.routing.routeLayer({
                    directions: dir,
                    fitBounds: true
                }));
            }
        </script>
    </head>

Optimized Routing