Leaflet Try It Now Routing Multiple Locations

var map,
                    dir;

map = L.map('map', {
                    layers: MQ.mapLayer(),
                    center: [ 42.346353, -71.415958 ],
                    zoom: 9
                });

dir = MQ.routing.directions();

dir.route({
                    locations: [
                        'worcester ma',
                        { latLng: { lat: 42.346797, lng: -71.547966 }},
                        { city: 'boston', state: 'ma' }
                    ]
                });

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

Routing with Multiple Locations