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Showing content from https://developers.google.com/maps/documentation/navigation/ios-sdk/speed_alerts below:

Configure speedometer alerts | Navigation SDK for iOS

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When navigation is enabled and the travel mode is set to driving, the Navigation SDK for iOS displays a speed limit control in the lower left corner of the map that shows the current speed limit. If a driver exceeds the speed limit, the control expands to display a speedometer next to the speed limit display and triggers alerts when the speed reaches a certain threshold.

By default, the Navigation SDK triggers a minor speed alert when the driver exceeds the speed limit by 5 mph (or 10 kph), and changes the color of the speedometer text to red. It triggers a major speed alert when the driver exceeds the speed limit by 10 mph (or 20 kph), and changes the speedometer background color to red.

You can customize both the threshold for triggering the alerts and the text and background colors the speedometer displays. You can also use the Navigation SDK to make the driver's speed information available. For example, you could make speed information available to rideshare operators to help them encourage their drivers to adhere to the speed limit and improve safety.

You can customize the speed alert threshold for both minor and major speed alerts as a percentage over the speed limit of the current speed. You can also specify how long the threshold is exceeded before the map displays the alert.

The following code example sets the threshold for a minor speed alert to five percent over the speed limit, and the threshold for a major speed alert to 10 percent over the speed limit. It specifies that the map displays an alert after an alert threshold has been exceeded for five seconds.

let minorSpeedAlertThresholdPercentage: CGFloat = 0.05 let
majorSpeedAlertThresholdPercentage: CGFloat = 0.1 let
severityUpgradeDurationSeconds: TimeInterval = 5

// Configure SpeedAlertOptions let mutableSpeedAlertOptions:
GMSNavigationMutableSpeedAlertOptions = GMSNavigationMutableSpeedAlertOptions()
 mutableSpeedAlertOptions.setSpeedAlertThresholdPercentage(minorSpeedAlertThresholdPercentage,
for: .minor)
mutableSpeedAlertOptions.setSpeedAlertThresholdPercentage(majorSpeedAlertThresholdPercentage,
for: .major) mutableSpeedAlertOptions.severityUpgradeDurationSeconds =
severityUpgradeDurationSeconds

// Set SpeedAlertOptions to Navigator. mapView.navigator?.speedAlertOptions =
mutableSpeedAlertOptions; mapView.navigator?.add(self); // Only needed if
listening to the delegate events.

static const CGFloat minorSpeedAlertThresholdPercentage = 0.05; static const
CGFloat majorSpeedAlertThresholdPercentage = 0.1; static const NSTimeInterval
severityUpgradeDurationSeconds = 5;

// Configure SpeedAlertOptions GMSNavigationMutableSpeedAlertOptions
*mutableSpeedAlertOptions = [[GMSNavigationMutableSpeedAlertOptions alloc]
init]; [mutableSpeedAlertOptions setSpeedAlertThresholdPercentage:
minorSpeedAlertThresholdPercentage
forSpeedAlertSeverity:GMSNavigationSpeedAlertSeverityMinor];
[mutableSpeedAlertOptions
setSpeedAlertThresholdPercentage:majorSpeedAlertThresholdPercentage
forSpeedAlertSeverity:GMSNavigationSpeedAlertSeverityMajor];
[mutableSpeedAlertOptions
setSeverityUpgradeDurationSeconds:severityUpgradeDurationSeconds];

// Set SpeedAlertOptions to Navigator. mapView.navigator.speedAlertOptions =
mutableSpeedAlertOptions; [mapView.navigator addListener:self]; // Only needed
if listening to the delegate events.

You can customize the colors of the speedometer display for each alert level.

The following table shows the default colors for speed alerts in the GMSNavigationSpeedometerUIOptions class:

You can specify the text and background color of the speedometer for both minor and major speed alerts:

let mutableSpeedometerUIOptions: GMSNavigationMutableSpeedometerUIOptions =
GMSNavigationMutableSpeedometerUIOptions()
mutableSpeedometerUIOptions.setTextColor(minorSpeedAlertTextColor, for: .minor,
lightingMode: .normal)
mutableSpeedometerUIOptions.setTextColor(majorSpeedAlertTextColor, for: .major,
lightingMode: .normal)
mutableSpeedometerUIOptions.setBackgroundColor(minorSpeedAlertNightModeBackgroundColor,
for: .minor, lightingMode: .lowLight)
mutableSpeedometerUIOptions.setBackgroundColor(majorSpeedAlertDayModeBackgroundColor,
for: .major, lightingMode: .normal)

mapView.settings.speedometerUIOptions = mutableSpeedometerUIOptions

GMSNavigationMutableSpeedometerUIOptions *mutableSpeedometerUIOptions =
[[GMSNavigationMutableSpeedometerUIOptions alloc] init];
[mutableSpeedometerUIOptions setTextColor: minorSpeedAlertTextColor
forSpeedAlertSeverity: GMSNavigationSpeedAlertSeverityMinor lightingMode:
GMSNavigationLightingModeNormal]; [mutableSpeedometerUIOptions setTextColor:
majorSpeedAlertTextColor forSpeedAlertSeverity:
GMSNavigationSpeedAlertSeverityMajor lightingMode:
GMSNavigationLightingModeNormal]; [mutableSpeedometerUIOptions
setBackgroundColor: minorSpeedAlertNightModeBackgroundColor
forSpeedAlertSeverity: GMSNavigationSpeedAlertSeverityMinor lightingMode:
GMSNavigationLightingModeLowLight]; [mutableSpeedometerUIOptions
setBackgroundColor: majorSpeedAlertDayModeBackgroundColor forSpeedAlertSeverity:
GMSNavigationSpeedAlertSeverityMajor
lightingMode:GMSNavigationLightingModeNormal];

mapView.settings.speedometerUIOptions = mutableSpeedometerUIOptions;

If your application requires sharing information about driver speed, you can also use the Navigation SDK to make the driver's speed information available. This can be useful for rideshare applications in which an operator may want to monitor excessive speeding by drivers to improve safety.

For example, the following example shares speed information when the speed is a specified percentage over the speed limit:

// Listener method for sharing speed information when the speed exceeds the
speed limit by a specified percentage. #pragma mark GMSNavigatorListener func
navigator(_ navigator : GMSNavigator, didUpdateSpeedingPercentage
percentageAboveLimit : Float) { ... }

// Listener method listening to speeding feed. #pragma mark
GMSNavigatorListener - (void)navigator:(GMSNavigator *)navigator
didUpdateSpeedingPercentage:(float)percentageAboveLimit { ... }

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 2025-08-14 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 2025-08-14 UTC."],[[["When navigation is in driving mode, the Navigation SDK displays the current speed limit and driver's speed, providing visual and configurable speed alerts."],["Developers can customize the thresholds for minor and major speed alerts, including the percentage over the speed limit and duration before triggering."],["The speedometer's text and background colors can be customized for day and night modes, allowing for clear visual distinction of speed alert levels."],["The Navigation SDK enables access to the driver's speed information, which can be used for purposes like monitoring driver behavior in rideshare applications."]]],["The Navigation SDK for iOS displays a speed limit and speedometer when driving. Speed alerts are triggered when the driver exceeds the limit. Minor alerts occur at 5 mph (or 10 kph) over, turning the text red. Major alerts occur at 10 mph (or 20 kph) over, turning the background red. Alert thresholds and colors are customizable, including percentages over the limit and time before the alert. The SDK also provides driver speed data for monitoring purposes, such as in rideshare apps.\n"]]

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