31:T761,map = { let h = (width<600) ? width + 200: width * 0.6, container = DOM.element('div', { style: `width:${width}px;height:${h}px` }); yield container; let map = L.map(container).setView([42.36,-71.10], 12); // initializes the map, sets zoom & coordinates let osmLayer = L.tileLayer('https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}@2x.png', { attribution: '© OpenStreetMap contributors' }).addTo(map); function geojsonMarkerOptions(d) { let tot = d.properties.classic_rides + d.properties.e_rides, classic = d.properties.classic_rides, e = d.properties.e_rides; let ratio = e/tot; let o = { radius : Math.max(3, Math.sqrt(tot)/8), fillColor : colorRamp(ratio), color : "#000", weight : 0.4, opacity : 1, fillOpacity : 1 } return o; }; let stationOverlay = L.geoJson(stationGeo, { pointToLayer: function (feature, latlng) { return L.circleMarker(latlng, geojsonMarkerOptions(feature)); }, onEachFeature: function(feature, layer) { let tot = feature.properties.classic_rides + feature.properties.e_rides, classic = feature.properties.classic_rides, e = feature.properties.e_rides; layer.bindPopup('

'+feature.properties.start_station_name+'

' +'

Total rides: '+ tot +'
' + classic + ' classic rides (' + (100*classic/tot).toFixed(2) +'%)' +'
' + e + ' e-bike rides (' + (100*e/tot).toFixed(1) +'%)') } }).addTo(map); let legend = L.control({position: 'bottomleft'}) legend.onAdd = function (map) {var div = L.DomUtil.create('div', 'legend'); return l}; legend.addTo(map); }32:[{"id":"2b9ffab5181e3abc968728e587bfc7cfbc12d2da85f22c0c62d54700571ddd5b266d741ee76ab5c721c2a0b077f1ad90a493d1a52570d352e9a826a2e4f2752f","href":"https://static.observableusercontent.com/files/2b9ffab5181e3abc968728e587bfc7cfbc12d2da85f22c0c62d54700571ddd5b266d741ee76ab5c721c2a0b077f1ad90a493d1a52570d352e9a826a2e4f2752f","name":"BluebikeWinter2024RidesByStationAndBikeType@1.csv","type":"text/csv","lastModified":1710943556999.118,"size":26206},{"id":"49ae8cefc95dd38eedcd088c8198b184836cf3ffefffa1ab9d534dd173e8c4f636917b83a30a44aeac2c31f64be4a94e75e1879f967c4f55b2fcd7183df3c869","href":"https://static.observableusercontent.com/files/49ae8cefc95dd38eedcd088c8198b184836cf3ffefffa1ab9d534dd173e8c4f636917b83a30a44aeac2c31f64be4a94e75e1879f967c4f55b2fcd7183df3c869","name":"BluebikeRidesByDateAndBikeType@1.csv","type":"text/csv","lastModified":1710943565001.299,"size":2418},{"id":"8f04e23b8b992c26d9be82e42388d5717f49bacdd278694cd52d9166a61e1aadd8219dfff1315a53ab6612ea5461f780efbacda25c64a64da43d923316016f4e","href":"https://static.observableusercontent.com/files/8f04e23b8b992c26d9be82e42388d5717f49bacdd278694cd52d9166a61e1aadd8219dfff1315a53ab6612ea5461f780efbacda25c64a64da43d923316016f4e","name":"monthlyBluebikesDataWCompFall2022-Spring2024","type":"application/octet-stream","lastModified":1715780769287.45,"size":313},{"id":"8f04e23b8b992c26d9be82e42388d5717f49bacdd278694cd52d9166a61e1aadd8219dfff1315a53ab6612ea5461f780efbacda25c64a64da43d923316016f4e","href":"https://static.observableusercontent.com/files/8f04e23b8b992c26d9be82e42388d5717f49bacdd278694cd52d9166a61e1aadd8219dfff1315a53ab6612ea5461f780efbacda25c64a64da43d923316016f4e","name":"monthlyBluebikesDataWCompFall2022-Spring2024@1","type":"application/octet-stream","lastModified":1715780783691.273,"size":313},{"id":"1a16f3afd8b30903608f1895e0f901130c289848e2901b4e102318a1caf7627c45512fb895a19c0886fae1bb8a17060df3476a535420ff11d31754375d7d415d","href":"https://static.observableusercontent.com/files/1a16f3afd8b30903608f1895e0f901130c289848e2901b4e102318a1caf7627c45512fb895a19c0886fae1bb8a17060df3476a535420ff11d31754375d7d415d","name":"monthlyWinterBluebikesData2022-2024","type":"application/octet-stream","lastModified":1715785171524.247,"size":508}] 2f:{"title":"Electric Bluebikes by the numbers","cells":[{"id":283,"value":"md`# Electric Bluebikes by the numbers\n##### By Christian MilNeil for [StreetsblogMASS](https://mass.streetsblog.org)\n\n\nIn late December 2023, the Bluebikes regional bikesharing system in greater Boston [began adding dozens of pedal-assist electric bikes to its fleet](https://mass.streetsblog.org/2023/12/20/electric-bluebikes-have-arrived-in-boston).\n\nOn a monthly basis, Bluebikes publishes data on every ride taken on the system: the date, starting and ending times and station locations. \n\nSince December, this data has also reported whether the ride used a \"classic\" bike or one of the new electric bikes.\n\nIn January, Bluebikes users rode electric bikes for 28 percent of all Bluebikes trips; in Feburary, electric bikes served 34 percent of trips. \n\nBelow is a plot of Bluebikes ridership from November 1, 2023 until February 29, 2024, with yellow bars to indicate e-bike rides after their official public debut on December 20:`","pinned":false,"hidden":false,"mode":"ojs"},{"id":428,"value":"viewof timescale = Inputs.radio([\"daily\", \"weekly\"], {label: \"Select one\", value: \"daily\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":397,"value":"barchart = Plot.plot({\n color: {legend: true},\n marginLeft: 50, marginBottom: 80, width: 900,\n x: {\n interval: timescale == \"daily\" ? \"day\" : \"week\",\n // tickFormat: (d) => d.toLocaleString(\"en\", {month: \"narrow\"}),\n label: null\n },\n y: {grid: true},\n marks: [\n Plot.barY(ridesByDate, {x: \"date\", y: \"rides\", fill: \"type\"}),\n Plot.ruleY([0]),\n Plot.tip( \n tipText[0],\n {x: new Date(\"2023-12-18\"), y: 2000, dy: -3, anchor: \"top-right\"}\n ),\n Plot.tip(\n tipText[1],\n {x: new Date(\"2024-01-07\"), y: 480, dx: 5, anchor:\"left\"\n }),\n Plot.tip(\n tipText[2],\n {x: new Date(\"2024-02-10\"), y: 10500, anchor:\"bottom\"\n })\n\n ]\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":604,"value":"Has the introduction of e-bikes led to increased Bluebikes ridership, or are these new e-bike trips merely replacing trips that people would have otherwise made on the classic bikes? \n\n","pinned":false,"hidden":false,"mode":"md"},{"id":602,"value":"It's hard to say by only looking at this data: ridership in November 2023, before e-bikes were available, was significantly higher, but a lot of people don't enjoy biking in the winter, and December and January have always been the lowest-ridership months for the Bluebikes system. \n\nInstead, let's look at a longer timescale, comparing monthly ridership in for the 6 late-fall and winter months of 2021 through 2023, before there were electric bikes, with the same months from the winter of 2023 and 2024:","pinned":false,"hidden":false,"mode":"md"},{"id":558,"value":"Plot.plot({\n color: {legend: true},\n marginLeft: 50, marginBottom: 80, width: 900,\n x: {tickFormat: \"\"},\n marks: [\n Plot.barY(ridesByMonth, {x: \"year\", fx: \"month\", y: \"rides\", fill: \"type\", sort: {fx: null}}),\n Plot.ruleY([0])\n ]\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":627,"value":"Ridership growth was definitely higher in 2024 during the three winter months when electric bikes were available, compared to the preceding fall months, when they were not. \n\nBut while fall ridership has been basically flat since 2021, winter ridership had already been growing considerably, even in the years before electric bikes became available. \n\nIn my opinion, we'll need to collect a few more months' worth of data, and see what happens over the summer and fall, before we can draw any real conclusions about the effect of e-bikes on total system ridership. ","pinned":false,"hidden":false,"mode":"md"},{"id":464,"value":"## Bluebikes trips by station, Dec. 20, 2023 to Feb. 29, 2024","pinned":false,"hidden":false,"mode":"md"},{"id":19,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":624,"value":"## Do your own analysis\n\nI've published a basic introduction to analyzing Bluebikes trip data in R, a programming language for statistics (these datasets are too large for more commonly-used programs like Microsoft Excel). [Read it here:](https://observablehq.com/@vigorousnorth/using-bluebikes-data-in-r)\n\n[observablehq.com/@vigorousnorth/using-bluebikes-data-in-r](https://observablehq.com/@vigorousnorth/using-bluebikes-data-in-r)","pinned":false,"hidden":false,"mode":"md"},{"id":4,"value":"L = require('leaflet@1.2.0')","pinned":true,"hidden":false,"mode":"ojs"},{"id":6,"value":"html``","pinned":true,"hidden":false,"mode":"ojs"},{"id":37,"value":"topojson = require(\"topojson-client@3\")\n","pinned":true,"hidden":false,"mode":"ojs"},{"id":529,"value":"tipText = (timescale == \"daily\") ? [ [`Dec. 18: 'Grinch storm' with 3\" rain, 60+ mph wind gusts`], [`Sunday Jan. 7: Rain, high temp. of 3° C`] , [`Sat. Feb. 10: sunny, high temp. of 15° C`]] : [[],[],[]];","pinned":false,"hidden":false,"mode":"ojs"},{"id":302,"value":"stationGeo = { \n let a = new Object;\n a.type = \"FeatureCollection\";\n a.features = stationArray;\n yield a;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":294,"value":"stationArray = stations.map( d => {\n let o = new Object;\n o.type = \"Feature\";\n o.properties = d;\n o.properties.e_rides = +d.e_rides;\n o.properties.classic_rides = +d.classic_rides;\n o.geometry = {\"type\":\"Point\", \"coordinates\": [+d.start_lng,+d.start_lat]};\n return o;\n });","pinned":false,"hidden":false,"mode":"ojs"},{"id":288,"value":"ridesByDate = {\n const data = await FileAttachment(\"BluebikeRidesByDateAndBikeType@1.csv\").csv({ typed: true });;\n return data.columns.slice(1)\n .flatMap((type) => data.map(({ date, [type]: rides}) => ({date, type, rides})));\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":550,"value":"ridesByMonth = {\n const data = await FileAttachment(\"monthlyWinterBluebikesData2022-2024\").csv({ typed: true });;\n return data.columns.slice(2)\n .flatMap((type) => data.map(({ month, year, [type]: rides}) => ({month, year, type, rides})));\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":376,"value":"stations = FileAttachment(\"BluebikeWinter2024RidesByStationAndBikeType@1.csv\").csv()","pinned":true,"hidden":false,"mode":"ojs"},{"id":106,"value":"import {legend} from \"@d3/color-legend\"","pinned":true,"hidden":false,"mode":"ojs"},{"id":111,"value":"colorRamp = d3.scaleLinear()\n .domain([0.1, 0.33, 0.5])\n .range([ \"#f1a340\",\"#f7f7f7\",\"#998ec3\"])","pinned":false,"hidden":false,"mode":"ojs"},{"id":108,"value":"l = legend({\n color: colorRamp,\n title: \"% of e-bike rides by station\", \n tickFormat: d => (d*100)+\"%\"\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":95,"value":"d3 = require('d3@5.0')\n","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W32","stdlib":"1","titling":"auto"}