Maybe you should wait an hour or two before leaving.
Google added a new feature to Google Maps that tells you when the best time to leave is (via Android Police).
The new feature is only available for Maps users on Android, and it pops up when you input directions. Along with showing you the usual estimated time and distance, a new bar graph will appear, showing the relative time it will take your trip now (highlighted in either green, yellow, or red to indicate current traffic conditions) and an estimate of both how long it would have taken a half hour earlier and how long it will take in the next few hours.
The new feature is rolling out to Google Maps users on Android now, although there’s no word as to when iOS users might see it.