Add a transit layer to a map.
function initialize() { var myLatlng = new google.maps.LatLng(51.501904,-0.115871); var mapOptions = { zoom: 13, center: myLatlng, mapTypeId: google.maps.MapTypeId.ROADMAP } var map = new google.maps.Map(document.getElementById(\'map-canvas\'), mapOptions); var transitLayer = new google.maps.TransitLayer(); transitLayer.setMap(map); } google.maps.event.addDomListener(window, \'load\', initialize);