@KMRalph

Associate Professor of Transportation Planning @blousteinschool. Videos on Transportation 101 here https://xitter.cf/t.co/Sv6OwZvznS All views are my own.

kelcieralph.org/
Joined November 2011
  • Tweets1.2K
  • Following1K
  • Followers1.7K
202Media
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.
15
163
117
392
I think about this graphic every time I cross a street in the U.S.
42
428
82
2,546
127,813
Lesson 2: Long trips—which are extremely rare—contribute disproportionately to mileage and emissions.
1
1
230
more replies
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.
1
157
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.
154
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: 🧵
1
5
1
11
709
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.
1
106
Kelcie Ralph, PhD retweeted
Michael Smart@heyitsmikesmart6 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
2
3
14
911
Do people have car brain? 🚗🧠 My graphical summary of @ianwalker and co.'s fantastic article. A thread... 🧵
2
12
2
32
4,580
more replies
Car brain for bending the rules? Drivers v. Chefs
1
215
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.
1
5
206
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.
1
3
1
12
4,792
more replies
Estimating daily VMT compounds uncertainty.
1
1
164
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
2
205
Load more