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Traffic Layer

Page Summary

This example demonstrates how to display real-time traffic data on a Google Map using the TrafficLayer class.
It provides code samples in TypeScript and JavaScript, along with HTML and CSS for creating the map interface.
The map is centered on a specific location (Los Angeles) and initialized with a zoom level of 13.
Users can try the sample on JSFiddle or Google Cloud Shell, or clone the repository and run it locally.

This example creates a map that uses a traffic layer to show real-time traffic information.

Read the documentation.

TypeScript

async function init(): Promise<void> {
    const { TrafficLayer } = await google.maps.importLibrary('maps');

    const mapElement =
        document.querySelector<google.maps.MapElement>('gmp-map')!;
    const innerMap = mapElement.innerMap;

    const trafficLayer = new TrafficLayer();

    trafficLayer.setMap(innerMap);
}

void init();index.ts

JavaScript

async function init() {
    const { TrafficLayer } = await google.maps.importLibrary('maps');

    const mapElement = document.querySelector('gmp-map');
    const innerMap = mapElement.innerMap;

    const trafficLayer = new TrafficLayer();

    trafficLayer.setMap(innerMap);
}

void init();index.js

CSS

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}
style.css

HTML

<html>
    <head>
        <title>Traffic Layer</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <script>
            // prettier-ignore
            (g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})({
                key: "GOOGLE_MAPS_API_KEY"
            });
        </script>
    </head>
    <body>
        <gmp-map
            center="34.04924594193164,-118.24104309082031"
            zoom="13"></gmp-map>
    </body>
</html>index.html

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

  git clone https://github.com/googlemaps-samples/js-api-samples.git
  cd samples/layer-traffic
  npm i
  npm start