Sourced from the 2012 DC Bicycle Count Summary, visualized with d3js.
Created
December 10, 2012 23:10
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Ratio of Average Bikers versus Miles of Bike Lanes 2004-2012
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| path.line { | |
| stroke-width:4; | |
| fill:none; | |
| stroke:darkblue; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.js"></script> | |
| <script> | |
| var margin = {top: 20, right: 20, bottom: 30, left: 50}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var parseDate = d3.time.format("%Y").parse, | |
| formatPercent = d3.format(".0%"); | |
| var x = d3.time.scale() | |
| .range([0, width]); | |
| var y = d3.scale.linear() | |
| .range([height, 0]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom"); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .tickFormat(formatPercent); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| var line = d3.svg.line() | |
| .x(function(d) { return x(d.date); }) | |
| .y(function(d) { return y(d.ratio); }); | |
| d3.csv("peak.csv", function(error, data) { | |
| data.forEach(function(d) { | |
| d.date = parseDate(d.year); | |
| d.ratio = +d['Peak Hour'] / +d['Miles of Bike Lanes']; | |
| }); | |
| x.domain(d3.extent(data, function(d) { return d.date; })); | |
| y.domain(d3.extent(data, function(d) { return d.ratio; })); | |
| var l = svg.selectAll(".browser") | |
| .data([data]) | |
| .enter().append("g") | |
| .attr("class", "browser"); | |
| l.append("path") | |
| .attr("class", "line") | |
| .attr("d", line); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis); | |
| }); | |
| </script> |
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| year | Peak Hour | Miles of Bike Lanes | |
|---|---|---|---|
| 2004 | 34.5 | 14 | |
| 2005 | 38.2 | 19 | |
| 2006 | 41.2 | 25 | |
| 2007 | 39.6 | 30 | |
| 2008 | 52.9 | 39 | |
| 2009 | 65.6 | 45 | |
| 2010 | 71.9 | 50 | |
| 2011 | 86.8 | 51 | |
| 2012 | 94.8 | 57 |
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