https://haraldkliems.netlify.app/ My personal website, with #rstats, transportation, open data, Madison, biking, and some health research Distill Tue, 28 Apr 2026 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2026-04-28-impermeable-areas-as-a-waffle-chart Data viz with waffle charts, or not Madison (WI) chart https://haraldkliems.netlify.app/posts/2026-04-28-impermeable-areas-as-a-waffle-chart Tue, 28 Apr 2026 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2026-03-26-some-wisconsin-county-population-data The 2025 Census Bureau Population Estimates are out Wisconsin population US Census Bureau https://haraldkliems.netlify.app/posts/2026-03-26-some-wisconsin-county-population-data Thu, 26 Mar 2026 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2026-02-08-street-level-imagery-and-openstreetmap I gave a talk at Mapping USA 2026 OpenStreetMap map https://haraldkliems.netlify.app/posts/2026-02-08-street-level-imagery-and-openstreetmap Sun, 08 Feb 2026 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2026-02-03-speed-limits-tertiary-higways-traffic-stress A look at OpenStreetMap data in Madison and Milwaukee transportation Madison (WI) Milwaukee (WI) OpenStreetMap https://haraldkliems.netlify.app/posts/2026-02-03-speed-limits-tertiary-higways-traffic-stress Tue, 03 Feb 2026 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/travel-times-on-willy-street-part-2 Another look at travel time estimates, now including the JND construction transportation Madison (WI) https://haraldkliems.netlify.app/posts/travel-times-on-willy-street-part-2 Mon, 03 Nov 2025 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2025-11-01-30-day-map-challenge-points Madison restaurants and their cuisine map Madison (WI) https://haraldkliems.netlify.app/posts/2025-11-01-30-day-map-challenge-points Sat, 01 Nov 2025 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/travel-times-on-willy-street A preliminary look at the data during the rush hour lane closure trial transportation Madison (WI) https://haraldkliems.netlify.app/posts/travel-times-on-willy-street Mon, 29 Sep 2025 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2025-09-21-how-many-cars-are-there-in-madison Using American Community Survey data to look at car ownership in Madison over time. American Community Survey transportation Madison (WI) https://haraldkliems.netlify.app/posts/2025-09-21-how-many-cars-are-there-in-madison Sun, 21 Sep 2025 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2025-09-13-using-the-google-routes-api-to-collect-travel-time-data-during-a-traffic-trial Using the Google Maps API to collect travel time data during a traffic trial Madison (WI) transportation https://haraldkliems.netlify.app/posts/2025-09-13-using-the-google-routes-api-to-collect-travel-time-data-during-a-traffic-trial Sat, 13 Sep 2025 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2025-05-20-wisconsin-county-population-change Which counties have gained the most population between 2020 and 2024? Which ones shrunk? Wisconsin population map https://haraldkliems.netlify.app/posts/2025-05-20-wisconsin-county-population-change Tue, 20 May 2025 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2025-03-31-a-3d-map-of-downtown-madison Using digital surface model data and `rayshader` to create a detailed rendering Madison (WI) rayshader map https://haraldkliems.netlify.app/posts/2025-03-31-a-3d-map-of-downtown-madison Mon, 31 Mar 2025 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2024-11-01-a-boring-points-map Comparing fair market and assessed value in Madison map Madison (WI) housing https://haraldkliems.netlify.app/posts/2024-11-01-a-boring-points-map Fri, 01 Nov 2024 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2024-09-13-nothing-new-on-mode-share-in-madison-in-2023 American Community Survey one-year estimates show commute mode share remains stable Madison (WI) transportation American Community Survey https://haraldkliems.netlify.app/posts/2024-09-13-nothing-new-on-mode-share-in-madison-in-2023 Fri, 13 Sep 2024 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/do-speed-limit-reductions-reduce-speeds Comparing pre-post data in Madison, Wisconsin Vision Zero transportation Madison (WI) Vision Zero https://haraldkliems.netlify.app/posts/do-speed-limit-reductions-reduce-speeds Wed, 14 Aug 2024 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2024-07-01-bicycle-network-analysis-and-bicycle-commute-mode-share Do better bike networks lead to more bike commuters? biking transportation American Community Survey https://haraldkliems.netlify.app/posts/2024-07-01-bicycle-network-analysis-and-bicycle-commute-mode-share Mon, 01 Jul 2024 00:00:00 +0000 Harald Kliems Austin Griesbach https://haraldkliems.netlify.app/posts/pedestrian-fatalities-soar-just-after-sunset Pedestrian fatality data from 2001-2021 and how the time of fatal crashes varies over the day Vision Zero walking transportation pedestrian fatalities FARS https://haraldkliems.netlify.app/posts/pedestrian-fatalities-soar-just-after-sunset Tue, 05 Mar 2024 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2024-02-29-where-are-the-4-car-households A quick look at households with 4 cars or more. American Community Survey maps transportation https://haraldkliems.netlify.app/posts/2024-02-29-where-are-the-4-car-households Wed, 28 Feb 2024 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2024-02-28-madisons-largest-temperature-swings From 67 to 15 F overnight?? Madison (WI) climate https://haraldkliems.netlify.app/posts/2024-02-28-madisons-largest-temperature-swings Wed, 28 Feb 2024 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2024-01-19-strava-vs-eco-counter Can Strava Metro data in Madison be a good indicator of overall bike traffic? https://haraldkliems.netlify.app/posts/2024-01-19-strava-vs-eco-counter Fri, 19 Jan 2024 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-11-30-population-growth-in-wisconsin Mapping population growth since the 2020 census Wisconsin population map https://haraldkliems.netlify.app/posts/2023-11-30-population-growth-in-wisconsin Thu, 30 Nov 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-11-09-winners-and-loser-in-bike-mode-share Where did bike commuting grow, where did it shrink. American Community Survey transportation biking https://haraldkliems.netlify.app/posts/2023-11-09-winners-and-loser-in-bike-mode-share Thu, 09 Nov 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-11-07-quick-post-commute-time-in-madison How long does it take Madisonians to get to work? Madison (WI) American Community Survey transportation quick post https://haraldkliems.netlify.app/posts/2023-11-07-quick-post-commute-time-in-madison Tue, 07 Nov 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-11-04-30daymapchallenge-a-bad-map-of-the-us Places that start with "bad" (but not "badger"!) map https://haraldkliems.netlify.app/posts/2023-11-04-30daymapchallenge-a-bad-map-of-the-us Sat, 04 Nov 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-10-29-quick-post-job-growth-in-dane-county Some maps and charts of 2015 and 2019 LEHD data Madison (WI) LEHD jobs maps quick post https://haraldkliems.netlify.app/posts/2023-10-29-quick-post-job-growth-in-dane-county Sun, 29 Oct 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/the-state-of-biking-in-madison-2022 A look at several indicators of how many people biked (and took other means of transportation). Madison (WI) transportation American Community Survey Eco Counter https://haraldkliems.netlify.app/posts/the-state-of-biking-in-madison-2022 Sat, 28 Oct 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-05-31-ntdr-an-r-package-for-transit-data An R package for National Transit Database data transit National Transit Database ntdr https://haraldkliems.netlify.app/posts/2023-05-31-ntdr-an-r-package-for-transit-data Wed, 31 May 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-05-23-rent-and-rent-burden-in-madison Some quick charts for Madison and how it compares to other US cities housing Madison (WI) American Community Survey https://haraldkliems.netlify.app/posts/2023-05-23-rent-and-rent-burden-in-madison Tue, 23 May 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/before-and-after-the-metro-network-redesign Comparing transit accessibility with the r5r package Madison (WI) transit GTFS accessibility r5r https://haraldkliems.netlify.app/posts/before-and-after-the-metro-network-redesign Mon, 24 Apr 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-03-26-understanding-adjusted-data-in-the-national-transit-database A comparison of Madison Metro ridership data released in the National Transit Database at different points in time. Madison (WI) transit National Transit Database https://haraldkliems.netlify.app/posts/2023-03-26-understanding-adjusted-data-in-the-national-transit-database Thu, 06 Apr 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2022-10-28-map-fun-with-city-of-madison-tax-parcel-data Building age, property use, and architectural styles in Madison Madison (WI) housing map https://haraldkliems.netlify.app/posts/2022-10-28-map-fun-with-city-of-madison-tax-parcel-data Tue, 21 Feb 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2023-02-18-using-knitr-and-rmarkdown-to-format-google-forms-responses Using `knitr` and `RMarkdown` for formatting form responses Madison (WI) Google Forms Madison Bikes RMarkdown knitr https://haraldkliems.netlify.app/posts/2023-02-18-using-knitr-and-rmarkdown-to-format-google-forms-responses Sat, 18 Feb 2023 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2022-12-03-bicycle-and-pedestrian-intersection-crashes-in-madison A quick look at crash data to support efforts to no longer allow right turns on red. Madison (WI) Vision Zero map https://haraldkliems.netlify.app/posts/2022-12-03-bicycle-and-pedestrian-intersection-crashes-in-madison Sat, 03 Dec 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2022-11-23-coffeeneuring-challenge-2022 Making a map of this year's season coffee map biking https://haraldkliems.netlify.app/posts/2022-11-23-coffeeneuring-challenge-2022 Wed, 23 Nov 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2022-11-19-the-color-of-roads What colors are most represented in the road names of Dane County? Madison (WI) Dane County (WI) map https://haraldkliems.netlify.app/posts/2022-11-19-the-color-of-roads Sat, 19 Nov 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2022-11-16-food-establishment-data-from-madison Challenge 15: Food/drink Madison (WI) map https://haraldkliems.netlify.app/posts/2022-11-16-food-establishment-data-from-madison Wed, 16 Nov 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2022-11-13-30daymapchallenge-5-minute-map 5-minute isochrones around Metro Transit bus stops Madison (WI) transit map https://haraldkliems.netlify.app/posts/2022-11-13-30daymapchallenge-5-minute-map Sun, 13 Nov 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/latest-commute-mode-share-madison-2021 Working from home has seen an unprecedented boom, while biking stagnates. Madison (WI) transportation American Community Survey https://haraldkliems.netlify.app/posts/latest-commute-mode-share-madison-2021 Wed, 12 Oct 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2022-08-26-using-r-markdown-and-msgxtractr-to-process-an-open-records-request Using R, {msgxtractor}, and R Markdown to wrangle a set of msg files open records purrr RMarkdown https://haraldkliems.netlify.app/posts/2022-08-26-using-r-markdown-and-msgxtractr-to-process-an-open-records-request Fri, 26 Aug 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/how-much-housing-is-being-built-in-madison A look at housing permit data over time. housing Madison (WI) https://haraldkliems.netlify.app/posts/how-much-housing-is-being-built-in-madison Sat, 06 Aug 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/how-far-can-you-go Comparing how far you can travel by bus, bike, and e-bike in Madison, before and after the bus network redesign transit map Madison (WI) https://haraldkliems.netlify.app/posts/how-far-can-you-go Sat, 30 Apr 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/metro-madison-ridership-has-not-recovered-from-covid A quick time series chart of Metro ridership going back to 2002 transit Madison (WI) time series chart https://haraldkliems.netlify.app/posts/metro-madison-ridership-has-not-recovered-from-covid Sun, 27 Mar 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/boardings-per-bus-per-stop-a-useful-metric A follow-up on a post on Metro bus boardings per stop in Madison (WI) transit Madison (WI) map https://haraldkliems.netlify.app/posts/boardings-per-bus-per-stop-a-useful-metric Sun, 06 Mar 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/a-vision-zero-twitter-bot-for-madison Using R, the rtweet package, and GitHub Actions to automate weekly tweets about traffic safety Vision Zero Madison (WI) Twitter https://haraldkliems.netlify.app/posts/a-vision-zero-twitter-bot-for-madison Fri, 18 Feb 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/do-crashes-have-a-history What the locations of past crashes can and cannot tell us about future crashes Vision Zero map Madison (WI) https://haraldkliems.netlify.app/posts/do-crashes-have-a-history Thu, 27 Jan 2022 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/where-the-shelter-cant-go-using-data-to-dissect-city-policy-making Policymakers proposed criteria for a where a shelter for homeless men in Madison (Wisconsin) could and couldn't go. This post uses public data to visualize these criteria, showing that in the end the resolution would have meant that the shelter can't go anywhere. housing Madison (WI) map https://haraldkliems.netlify.app/posts/where-the-shelter-cant-go-using-data-to-dissect-city-policy-making Sat, 24 Jul 2021 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/scraping-4s Web scraping and text analysis of the Society of Social Studies of Science's 2021 annual meeting panels. https://haraldkliems.netlify.app/posts/scraping-4s Sat, 10 Apr 2021 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/madison-common-council-advisory-referendum-2021 How precincts voted about the questions whether Madison Alder should be a full-time job and how long terms should be https://haraldkliems.netlify.app/posts/madison-common-council-advisory-referendum-2021 Wed, 07 Apr 2021 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/dane-county-migration-flows The `tidycensus` package got an exciting new function https://haraldkliems.netlify.app/posts/dane-county-migration-flows Fri, 02 Apr 2021 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/raceethnicity-by-ward What are the racial demographics of Madison's aldermanic districts https://haraldkliems.netlify.app/posts/raceethnicity-by-ward Thu, 11 Feb 2021 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/commuteflowsinmadison LODES provides origin-destination data for connecting work and home. This article looks at patterns in those flows in Wisconsin, and especially in Madison https://haraldkliems.netlify.app/posts/commuteflowsinmadison Mon, 25 Jan 2021 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/getting-to-work-in-madison Commute mode share by minority status and income https://haraldkliems.netlify.app/posts/getting-to-work-in-madison Fri, 25 Dec 2020 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/bus-boardings-in-madison Using the `mapdeck` package to visualize Metro Transit bus boardings in Madison (WI) https://haraldkliems.netlify.app/posts/bus-boardings-in-madison Sun, 18 Oct 2020 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2020-03-05-transportation-funding-wisconsin A look at the 2020 Multimodal Local Supplement Awards in Wisconsin to assess how multimodal they really are https://haraldkliems.netlify.app/posts/2020-03-05-transportation-funding-wisconsin Thu, 05 Mar 2020 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/2019-06-25-some-furter-zoning-analyses-for-madison A follow-up post on zoning and density in Madison and how it compares to other cities in the US. https://haraldkliems.netlify.app/posts/2019-06-25-some-furter-zoning-analyses-for-madison Tue, 25 Jun 2019 00:00:00 +0000 Harald Kliems https://haraldkliems.netlify.app/posts/how-much-of-madison-allows-only-detached-single-family-housing Recreating a _New York Times_ analysis of how much of Madison's residential areas only allowed single-family detached homes https://haraldkliems.netlify.app/posts/how-much-of-madison-allows-only-detached-single-family-housing Wed, 19 Jun 2019 00:00:00 +0000