How do you change the color of the dotted line on Google map v3 directions

Question

I am working on Transit directions and have been able to change the color of polyline displayed for transit route using polylineOptions property.

However, I am not a

Answer 1

There is no property (currently) that allows that part of the polyline to be styled. One option is to hide the DirectionRenderer Polyline and render the polylines yourself, that gives you complete control over the separate polylines.

var polylineOptions = {
  strokeColor: '#C83939',
  strokeOpacity: 1,
  strokeWeight: 4
};
var walkingPolylineOptions = {
  strokeColor: '#C83939',
  strokeOpacity: 0,
  strokeWeight: 4,
  icons: [{
    icon: {
      path: google.maps.SymbolPath.CIRCLE,
      fillColor: '#C83939',
      fillOpacity: 1,
      scale: 2,
      strokeColor: '#C83939',
      strokeOpacity: 1,
    },
    offset: '0',
    repeat: '10px'
  }]
};

function renderDirectionsPolylines(response) {
  var legs = response.routes[0].legs;
  for (i = 0; i < legs.length; i++) {
    var steps = legs[i].steps;
    for (j = 0; j < steps.length; j++) {
      var nextSegment = steps[j].path;
      var stepPolyline = new google.maps.Polyline(polylineOptions);
      if (steps[j].travel_mode == google.maps.TravelMode.WALKING) {
        stepPolyline.setOptions(walkingPolylineOptions)
      }
      for (k = 0; k < nextSegment.length; k++) {
        stepPolyline.getPath().push(nextSegment[k]);
      }
      stepPolyline.setMap(map);
    }
  }
}

proof of concept fiddle

code snippet:

var polylineOptions = {
  strokeColor: '#C83939',
  strokeOpacity: 1,
  strokeWeight: 4
};
var walkingPolylineOptions = {
  strokeColor: '#C83939',
  strokeOpacity: 0,
  strokeWeight: 4,
  icons: [{
    icon: {
      path: google.maps.SymbolPath.CIRCLE,
      fillColor: '#C83939',
      fillOpacity: 1,
      scale: 2,
      strokeColor: '#C83939',
      strokeOpacity: 1,
    },
    offset: '0',
    repeat: '10px'
  }]
};

function renderDirectionsPolylines(response) {
  var legs = response.routes[0].legs;
  for (i = 0; i < legs.length; i++) {
    var steps = legs[i].steps;
    for (j = 0; j < steps.length; j++) {
      var nextSegment = steps[j].path;
      var stepPolyline = new google.maps.Polyline(polylineOptions);
      if (steps[j].travel_mode == google.maps.TravelMode.WALKING) {
        stepPolyline.setOptions(walkingPolylineOptions)
      }
      for (k = 0; k < nextSegment.length; k++) {
        stepPolyline.getPath().push(nextSegment[k]);
      }
      stepPolyline.setMap(map);
    }
  }
}

var directions = new google.maps.DirectionsService();
var renderer = new google.maps.DirectionsRenderer({
  suppressPolylines: true,
});
var map, transitLayer;

function initialize() {
  var mapOptions = {
    zoom: 13,
    center: new google.maps.LatLng(40.7482333, -73.8681295),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };

  map = new google.maps.Map(document.getElementById('map'), mapOptions);

  google.maps.event.addDomListener(document.getElementById('go'), 'click',
    route);

  var input = document.getElementById('from');
  var autocomplete = new google.maps.places.Autocomplete(input);
  autocomplete.bindTo('bounds', map);

  transitLayer = new google.maps.TransitLayer();

  var control = document.getElementById('transit-wpr');
  map.controls[google.maps.ControlPosition.TOP_RIGHT].push(control);

  google.maps.event.addDomListener(control, 'click', function() {
    transitLayer.setMap(transitLayer.getMap() ? null : map);
  });

  addDepart();
  route();
}

function addDepart() {
  var depart = document.getElementById('depart');
  for (var i = 0; i < 24; i++) {
    for (var j = 0; j < 60; j += 15) {
      var x = i < 10 ? '0' + i : i;
      var y = j < 10 ? '0' + j : j;
      depart.innerHTML += '' + x + ':' + y + '';
    }
  }
}

function route() {
  var departure = document.getElementById('depart').value;
  var bits = departure.split(':');
  var now = new Date();
  var tzOffset = (now.getTimezoneOffset() + 60) * 60 * 1000;
  var time = new Date();
  time.setHours(bits[0]);
  time.setMinutes(bits[1]);
  var ms = time.getTime() - tzOffset;
  if (ms < now.getTime()) {
    ms += 24 * 60 * 60 * 1000;
  }
  var departureTime = new Date(ms);
  var request = {
    origin: document.getElementById('from').value,
    destination: '51 St, New York, NY 10022, USA',
    travelMode: google.maps.DirectionsTravelMode.TRANSIT,
    provideRouteAlternatives: true,
    transitOptions: {
      departureTime: departureTime
    }
  };
  var panel = document.getElementById('panel');
  panel.innerHTML = '';
  directions.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      renderer.setDirections(response);
      renderer.setMap(map);
      renderer.setPanel(panel);
      renderDirectionsPolylines(response);
      console.log(renderer.getDirections());
    } else {
      renderer.setMap(null);
      renderer.setPanel(null);
    }
  });
}
google.maps.event.addDomListener(window, 'load', initialize);

html,
body {
  height: 100%;
  padding: 0;
  margin: 0;
  color: black;
  font-family: arial, sans-serif;
  font-size: 13px;
}
#map {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 50%;
}
#panel-wpr {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  right: 0;
  overflow: auto;
}
#panel {
  font-family: arial;
  padding: 0 5px;
}
#info {
  padding: 5px;
}
#from {
  width: 90%;
  font-size: 1.2em;
}
.adp-directions {
  width: 100%;
}
.input {
  background-color: white;
  padding-left: 8px;
  border: 1px solid #D9D9D9;
  border-top: 1px solid silver;
  -webkit-border-radius: 1px;
  -moz-border-radius: 1px;
  border-radius: 1px;
}
.time {
  margin: 0;
  height: 17px;
  border: 1px solid;
  border-top-color: #CCC;
  border-right-color: #999;
  border-left-color: #999;
  border-bottom-color: #CCC;
  padding: 2px 15px 1px 1px;
}
button {
  border: 1px solid #3079ED;
  color: white;
  background-color: #4D90FE;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#4D90FE), to(#4787ED));
  background-image: -webkit-linear-gradient(top, #4D90FE, #4787ED);
  background-image: -moz-linear-gradient(top, #4D90FE, #4787ED);
  background-image: -ms-linear-gradient(top, #4D90FE, #4787ED);
  background-image: -o-linear-gradient(top, #4D90FE, #4787ED);
  background-image: linear-gradient(top, #4D90FE, #4787ED);
  filter: progid: DXImageTransform.Microsoft.gradient(startColorStr='#4d90fe', EndColorStr='#4787ed');
  display: inline-block;
  min-width: 54px;
  text-align: center;
  font-weight: bold;
  padding: 0 8px;
  line-height: 27px;
  -webkit-border-radius: 2px;
  -moz-border-radius: 2px;
  border-radius: 2px;
  -webkit-transition: all 0.218s;
  -moz-transition: all 0.218s;
  -o-transition: all 0.218s;
  transition: all 0.218s;
}
#info div {
  line-height: 22px;
  font-size: 110%;
}
.btn {} #panel-wpr {
  border-left: 1px solid #e6e6e6;
}
#info {
  border-bottom: 1px solid #E6E6E6;
  margin-bottom: 5px;
}
h2 {
  margin: 0;
  padding: 0;
}

  Toggle transit layer



  

    

      
Transit directions
    
    

      from:
      
    
    

      to:
      51 St, New York, NY 10022, USA
    
    
Depart at
      
    
    

      Get Directions