Lots of people come into DC each day, but where are they coming from? The dots on this map shows a normal work day’s travel for everyone who commutes 20-100 miles to work in DC.

This visualization shows where DC workers live. GIF by the author, using Mark Evans’ data visualization tool.

The map comes from a new tool by Mark Evans that uses data from the American Commuter Community Survey (administered by the Census Bureau) and Google Maps to visualize the commutes to and from places all over the US.

On the map, the larger the dot, the larger the number of workers making the trek to/from a certain location. The tool uses 4.1 million lines of census data to show the distribution of workers during the day.

Not many people will be surprised by the sheer amount of commuters that make their way to DC each day. But it’s certainly interesting to see where everyone is coming from.

You can play around with the map here. Notice any interesting trends?

Correction: This post originally said the image captured everyone who commutes to work in DC, but it’s actually only people who travel between 20 and 100 miles. You can adjust the tool to show commutes for people who live in DC, and for those who live up to 300 miles away.