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Kelcie Ralph, PhD @KMRalph

Associate Professor of Transportation Planning @blousteinschool. Videos on Transportation 101 here tinyurl.com/y4z3xkzp All views are my own.

Joined November 2011
  • Tweets 1,178
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  • Followers 1,745
202 Photos and videos
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Kelcie Ralph, PhD@KMRalph
15 Nov 2019
New article alert! Hot off the presses thanks to the hard work of @DrTaraGoddard @cgthigpen and @EvanIacobucci We find that minor editorial changes in news coverage of traffic crashes affect how readers understand what happened and what they think we should do about it.
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Kelcie Ralph, PhD retweeted
Mark R. Brown, AICP, CNU
@CompletedStreet
20 Oct 2024
I think about this graphic every time I cross a street in the U.S.
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Lesson 2: Long trips—which are extremely rare—contribute disproportionately to mileage and emissions.
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Tackling emissions from air travel poses unique opportunities and challenges. While miles flown continue to increase, flying remains highly unequal: ~20% of fliers in the UK take ¾ of all flights.
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The full article is available open access in Nature Energy. nature.com/articles/s41560-0… Here's the full table of policy levers they compared. Any of them would be an immense challenge to implement, but knowing the emission reduction sensitivity can help us make wise decisions.
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Folks who care deeply about reducing the environmental impact of travel should have new research from @jillian_anable, @ZiaWadud, and @DrAdeelM on their radar. Punchline: long distance trips deserve greater attention in our carbon reduction efforts. My graphical summary: 🧵
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The team analyzed all trips across an entire year for residents of England. Lesson 1: While short trips are common over the year, they contribute a small share of annual miles and emissions.
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Kelcie Ralph, PhD retweeted
Michael Smart@heyitsmikesmart
6 Sep 2024
Zero-car households often get around in cars--we investigated how they do that! Invisible Rides: Nicholas J. Klein, Anne Brown, Amanda Howell, Michael J. Smart, 2024 journals.sagepub.com/eprint/…

Invisible Rides: How Car-Less Americans Access Cars - Nicholas J. Klein, Anne Brown, Amanda Howell,...

How and why do zero-car households seek car access? We used a national online survey of 830 American adults and interviews with twenty-nine low- and moderate-in...

journals.sagepub.com
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Do people have car brain? 🚗🧠 My graphical summary of @ianwalker and co.'s fantastic article. A thread... 🧵
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Car brain for bending the rules? Drivers v. Chefs
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Overall, people tend to treat driving and other activities very differently. Car brain at work! 🚗🧠 Link to article: doi.org/10.1504/IJENVH.2023.… Congrats to @ianwalker, @AlanTapp, and Adrian Davis.
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Many people think we should switch from using Trip Generation rates to estimating site-level Vehicle Miles Traveled (VMT). My brilliant friends @turleyvoulgaris @greg_macfarlane and Joseph Kaylor have a warning: estimating site-level VMT isn't as easy as it sounds.
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Estimating daily VMT compounds uncertainty.
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Full article: Whose Miles Are These Anyway? Estimating Site-Generated Vehicle Miles Traveled DOI: doi.org/10.1080/01944363.202… Congrats to @turleyvoulgaris, @greg_macfarlane, and Joseph Kaylor for this important work.

Whose Miles Are These Anyway?

State, local, and private-sector climate policies increasingly require estimates of site-generated vehicle miles traveled (VMT) for individual properties. No standard, agreed-upon method exists for...

tandfonline.com
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