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Traffic, Transit, and Bicycling Layers | Maps JavaScript API

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The Traffic, Transit, and Bicycling layers modify the base map layer to display current traffic conditions, local transit networks, or bicycling route information. These layers are available in select regions.

The Maps JavaScript API allows you to add real-time traffic information (where supported) to your maps using the TrafficLayer object. Traffic information is refreshed frequently, but not instantly. Rapid consecutive requests for the same area are unlikely to yield different results.

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 13,
      center: { lat: 34.04924594193164, lng: -118.24104309082031 },
    }
  );

  const trafficLayer = new google.maps.TrafficLayer();

  trafficLayer.setMap(map);
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 13,
    center: { lat: 34.04924594193164, lng: -118.24104309082031 },
  });
  const trafficLayer = new google.maps.TrafficLayer();

  trafficLayer.setMap(map);
}

window.initMap = initMap;

The Maps JavaScript API allows you to display the public transit network of a city on your map using the TransitLayer object. When the Transit Layer is enabled, and the map is centered on a city that supports transit information, the map will display major transit lines as thick, colored lines. The color of the line is set based upon information from the transit line operator. Enabling the Transit Layer will alter the style of the base map to better emphasize transit routes.

If you’re a public agency that oversees public transportation for your city and would like your data to be included, please visit the Google Transit Partner Program site to learn more.

The following example shows the Transit layer enabled on a map of London, UK:

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 13,
      center: { lat: 51.501904, lng: -0.115871 },
    }
  );

  const transitLayer = new google.maps.TransitLayer();

  transitLayer.setMap(map);
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 13,
    center: { lat: 51.501904, lng: -0.115871 },
  });
  const transitLayer = new google.maps.TransitLayer();

  transitLayer.setMap(map);
}

window.initMap = initMap;

The Maps JavaScript API allows you to add bicycle information to your maps using the BicyclingLayer object. The BicyclingLayer renders a layer of bike paths, suggested bike routes and other overlays specific to bicycling usage on top of the given map. Additionally, the layer alters the style of the base map itself to emphasize streets supporting bicycle routes and de-emphasize streets inappropriate for bicycles.

The following example shows the Bicycle layer enabled on a map of Cambridge, MA:

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 14,
      center: { lat: 42.3726399, lng: -71.1096528 },
    }
  );

  const bikeLayer = new google.maps.BicyclingLayer();

  bikeLayer.setMap(map);
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 14,
    center: { lat: 42.3726399, lng: -71.1096528 },
  });
  const bikeLayer = new google.maps.BicyclingLayer();

  bikeLayer.setMap(map);
}

window.initMap = initMap;

Dark green routes indicated dedicated bicycle routes. Light green routes indicate streets with dedicated “bike lanes.” Dashed routes indicate streets or paths otherwise recommended for bicycle usage.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-07-09 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-09 UTC."],[[["The Maps JavaScript API offers Traffic, Transit, and Bicycling layers to enhance the base map with real-time information."],["These layers provide data on current traffic conditions, public transit networks, and bicycle routes, respectively."],["The layers are implemented using `TrafficLayer`, `TransitLayer`, and `BicyclingLayer` objects and are available in select regions."],["Transit Layer data is sourced from the Google Transit Partner Program, and public agencies can contribute their city's data."],["Bicycling Layer visually differentiates dedicated bike routes, bike lanes, and recommended paths using varying colors and styles."]]],["The core content describes how to use the Maps JavaScript API to overlay traffic, transit, and bicycling information on maps. The `TrafficLayer` displays real-time traffic conditions, refreshing frequently. The `TransitLayer` shows a city's public transit network, highlighting major lines. The `BicyclingLayer` adds bike paths and recommended routes. Each layer alters the base map's style. Each layer provides examples in TypeScript and JavaScript, and includes the use of `TrafficLayer`, `TransitLayer`, or `BicyclingLayer` objects with `setMap`.\n"]]

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