You can do this with the Multi-Place app
From the description:
Automate based on current traffic conditions.
Before you typically leave for a certain destination, like work or school, Multi-Place checks traffic conditions for you. Set up Multi-Place to turn on a switch or notify you with a push notification if traffic is bad and you need to leave X minutes earlier than usual. Or, configure Multi-Place to just discretely display that information on your dashboard only when necessary, so as to keep your dashboard clean and not interrupt you otherwise. Multi-Place stays aprised of traffic conditions shortly before and throughout the window of time that you typically depart for your destination, so you don't have to worry about missing a traffic update.
