This visualization maps estimated foot traffic across Manhattan, with each neighborhood polygon colored on a gradient from light to dark blue to indicate relative pedestrian volume. The map is rendered as an SVG using D3 v3, with a Mercator projection and topojson for geographic data. Color intensity reflects the average foot traffic rating per polygon, and a color bar provides a legend. The code uses `d3.json` and `d3.csv` to load the geographic and traffic data, then applies a linear color scale to fill each polygon.