From the main menu, select Settings > Traffic.

Traffic

Enables traffic.

Current Provider

Sets the traffic provider to use for traffic data. The Auto option selects the best available traffic data automatically.

Subscriptions

Lists the current traffic subscriptions.

Optimize Route

Enables the device to use optimized alternate routes automatically or upon request (Avoiding Traffic Delays on Your Route).

Traffic Alerts

Sets the traffic delay severity for which the device displays a traffic alert.

Traffic Voice Prompts

Enables voice prompts for traffic events.