Thanks to a collection of traffic speed data from INRIX, we’ve been watching how waves of traffic formed, moved, and dissipated on the roads near Washington in the days around Thanksgiving.

I was expecting the greatest congestion to have been on the Wednesday evening before the long Thanksgiving weekend, but it looks like Tuesday was when the roads were actually the busiest. And it’s no surprise to anyone familiar with the area that Interstate 95 south of DC and the Capital Beltway were usually the worst offenders at any time. The Thanksgiving weekend itself was fairly quiet.

Check back soon for news about adding traffic to your MapBox maps, and if you’re traveling this weekend, have a safe trip!