Luyu Liu
@luyuliu.bsky.social
Assistant Professor @AuburnGeosciences. Transportation geography, Public transit, Urban computing. luyuliu.github.io
Another reminder to do toilet accessibility
October 31, 2025 at 5:26 PM
Another reminder to do toilet accessibility
Reposted by Luyu Liu
So bus fare evasion explosion actually did not start as soon as the MTA started collecting fares after the Covid free buses period – at that point, evasion was not that different from pre-Covid. It was more closely associated with the OMNY rollout, which starting getting people off of passes.
An interesting investigation in @upshot.nytimes.com today evaluating some of the challenges to improving buses in NYC—whether through speed or fares www.nytimes.com/interactive/... (gift link!)
Interesting tidbit: Bus ridership is basically back to pre-pandemic levels—but fare payment is way down.
Interesting tidbit: Bus ridership is basically back to pre-pandemic levels—but fare payment is way down.
October 27, 2025 at 2:15 PM
So bus fare evasion explosion actually did not start as soon as the MTA started collecting fares after the Covid free buses period – at that point, evasion was not that different from pre-Covid. It was more closely associated with the OMNY rollout, which starting getting people off of passes.
oh did I mention that that's my own paper?
You know the publication industry is so not well when you clicked in a journal article and your Rakuten plug-in reminds you there are three available coupons for this website
February 13, 2025 at 9:02 AM
oh did I mention that that's my own paper?
You know the publication industry is so not well when you clicked in a journal article and your Rakuten plug-in reminds you there are three available coupons for this website
February 13, 2025 at 9:01 AM
You know the publication industry is so not well when you clicked in a journal article and your Rakuten plug-in reminds you there are three available coupons for this website
Reposted by Luyu Liu
Yes.
@hankgreen.bsky.social Is a science project just a nonfiction art project?
December 16, 2024 at 3:49 PM
Yes.
Our new paper at TR-D authors.elsevier.com/a/1kGKc4rgZi...
We use large-scale mobile device location data to infer the evacuation behavior during Hurricane Ian in 2022. The landfall area has much lower evacuation rate but higher partially-compliant rate, correlated with late order in the area.
We use large-scale mobile device location data to infer the evacuation behavior during Hurricane Ian in 2022. The landfall area has much lower evacuation rate but higher partially-compliant rate, correlated with late order in the area.
December 16, 2024 at 5:30 PM
Our new paper at TR-D authors.elsevier.com/a/1kGKc4rgZi...
We use large-scale mobile device location data to infer the evacuation behavior during Hurricane Ian in 2022. The landfall area has much lower evacuation rate but higher partially-compliant rate, correlated with late order in the area.
We use large-scale mobile device location data to infer the evacuation behavior during Hurricane Ian in 2022. The landfall area has much lower evacuation rate but higher partially-compliant rate, correlated with late order in the area.
Reposted by Luyu Liu
Seattle's Sound Transit light rail system carried 106,000 riders on the average weekday in October, reaching a monthly record of more than 3 million trips www.soundtransit.org/ride-with-us...
Ridership has been powered by extensions to Northgate (2021), Lynnwood (2024) & Bellevue (2024).
Ridership has been powered by extensions to Northgate (2021), Lynnwood (2024) & Bellevue (2024).
December 10, 2024 at 3:52 PM
Seattle's Sound Transit light rail system carried 106,000 riders on the average weekday in October, reaching a monthly record of more than 3 million trips www.soundtransit.org/ride-with-us...
Ridership has been powered by extensions to Northgate (2021), Lynnwood (2024) & Bellevue (2024).
Ridership has been powered by extensions to Northgate (2021), Lynnwood (2024) & Bellevue (2024).
believe it or not, we did a paper on this: www.sciencedirect.com/science/arti...
There were 200 - 800 people with mobility disabilities in Columbus Ohio who were actively using public transit service, even in the worst days of COVID. That number sometimes exceeded the **paratransit users**.
There were 200 - 800 people with mobility disabilities in Columbus Ohio who were actively using public transit service, even in the worst days of COVID. That number sometimes exceeded the **paratransit users**.
December 10, 2024 at 9:24 PM
believe it or not, we did a paper on this: www.sciencedirect.com/science/arti...
There were 200 - 800 people with mobility disabilities in Columbus Ohio who were actively using public transit service, even in the worst days of COVID. That number sometimes exceeded the **paratransit users**.
There were 200 - 800 people with mobility disabilities in Columbus Ohio who were actively using public transit service, even in the worst days of COVID. That number sometimes exceeded the **paratransit users**.
Reposted by Luyu Liu
“The cost of living in harm’s way has gone up disproportionately,” said @benkeys.bsky.social. “We are seeing the first broad-based direct cost of climate change for homeowners because of these insurance increases.”
We're still in the early days of this crisis.
www.theguardian.com/environment/...
We're still in the early days of this crisis.
www.theguardian.com/environment/...
How climate risks are driving up insurance premiums around the US – visualized
‘Tight correlation’ between premium rises and counties deemed most at risk from climate crisis, experts say
www.theguardian.com
December 9, 2024 at 8:59 PM
“The cost of living in harm’s way has gone up disproportionately,” said @benkeys.bsky.social. “We are seeing the first broad-based direct cost of climate change for homeowners because of these insurance increases.”
We're still in the early days of this crisis.
www.theguardian.com/environment/...
We're still in the early days of this crisis.
www.theguardian.com/environment/...
December 10, 2024 at 4:53 PM
Writing the first ever letter of recommendation for students and it does feel... I don't know... assuring and relieving? I always felt kinda guilty for troubling my reference considering how busy they are, and now it's my turn. It does feel like a part of my job to help the next generation.
December 5, 2024 at 11:13 PM
Writing the first ever letter of recommendation for students and it does feel... I don't know... assuring and relieving? I always felt kinda guilty for troubling my reference considering how busy they are, and now it's my turn. It does feel like a part of my job to help the next generation.
Reposted by Luyu Liu
Insurance is the canary in the coal mine for the climate crisis. No insurance -> no mortgages -> no housing market.
www.theguardian.com/environment/...
www.theguardian.com/environment/...
How climate risks are driving up insurance premiums around the US – visualized
‘Tight correlation’ between premium rises and counties deemed most at risk from climate crisis, experts say
www.theguardian.com
December 5, 2024 at 11:49 AM
Insurance is the canary in the coal mine for the climate crisis. No insurance -> no mortgages -> no housing market.
www.theguardian.com/environment/...
www.theguardian.com/environment/...
Most fun in the geosciences department is that everyone does all kinds of different research. I study buses and my colleagues study sea cucumbers with little wings
December 5, 2024 at 9:53 PM
Most fun in the geosciences department is that everyone does all kinds of different research. I study buses and my colleagues study sea cucumbers with little wings
Reposted by Luyu Liu
Hi Bluesky TRBers, continuing our annual tradition with the #TRBAM reception spreadsheet for 2025!
As always, please add receptions and share with friends and colleagues.
Looking forward to seeing everyone at the TRB Annual Meeting next month!
docs.google.com/spreadsheets...
As always, please add receptions and share with friends and colleagues.
Looking forward to seeing everyone at the TRB Annual Meeting next month!
docs.google.com/spreadsheets...
2025 TRB Annual Meeting Reception List
docs.google.com
December 2, 2024 at 10:47 PM
Hi Bluesky TRBers, continuing our annual tradition with the #TRBAM reception spreadsheet for 2025!
As always, please add receptions and share with friends and colleagues.
Looking forward to seeing everyone at the TRB Annual Meeting next month!
docs.google.com/spreadsheets...
As always, please add receptions and share with friends and colleagues.
Looking forward to seeing everyone at the TRB Annual Meeting next month!
docs.google.com/spreadsheets...
Writing syllabus for the next year and I can already see my students and I pulling hairs
December 3, 2024 at 5:04 AM
Writing syllabus for the next year and I can already see my students and I pulling hairs
Someone clearly submitted a paper and recommended and then impersonated two fictional reviewers. I wonder how they found this lol, maybe reviewer 2 was not harsh enough
November 25, 2024 at 5:32 PM
Someone clearly submitted a paper and recommended and then impersonated two fictional reviewers. I wonder how they found this lol, maybe reviewer 2 was not harsh enough
Reposted by Luyu Liu
A new starter pack: go.bsky.app/LaeKYA2 . Let me know who else belongs in the comments.
November 21, 2024 at 1:30 AM
A new starter pack: go.bsky.app/LaeKYA2 . Let me know who else belongs in the comments.
I had to reject my top candidate because the candidate didn't pass security screening. Just saying - we need international students more than international students need us.
November 19, 2024 at 4:09 PM
I had to reject my top candidate because the candidate didn't pass security screening. Just saying - we need international students more than international students need us.
If anyone is curious, clearly if you delete fields in a geopackage layer and export it to feature class, the output feature class's fields will be shifted two columns all together because I guess they will regenerate shape_length and shape_area and therefore messed up the whole table
Sometimes I feel sorry for my students. These small bugs can really be hurting the whole images of GIS as a domain. And I don't know how many wrong conclusions researchers and planners got by just error 4. The worst type of errors is the errors without error message.
ArcGIS bugs I encountered in THIS afternoon:
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
November 18, 2024 at 11:13 PM
If anyone is curious, clearly if you delete fields in a geopackage layer and export it to feature class, the output feature class's fields will be shifted two columns all together because I guess they will regenerate shape_length and shape_area and therefore messed up the whole table
Sometimes I feel sorry for my students. These small bugs can really be hurting the whole images of GIS as a domain. And I don't know how many wrong conclusions researchers and planners got by just error 4. The worst type of errors is the errors without error message.
ArcGIS bugs I encountered in THIS afternoon:
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
November 18, 2024 at 11:11 PM
Sometimes I feel sorry for my students. These small bugs can really be hurting the whole images of GIS as a domain. And I don't know how many wrong conclusions researchers and planners got by just error 4. The worst type of errors is the errors without error message.
ArcGIS bugs I encountered in THIS afternoon:
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
November 18, 2024 at 11:07 PM
ArcGIS bugs I encountered in THIS afternoon:
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
1. Joining shapefile and csv broken.
2. Export joined shapefile to feature class messed up all attribute table.
3. Cleaned cache and the problems persist. Finally do it in QGIS.
4. Deleting fields and then export feature messed up order of fields
If you also do what I’m doing then you are not part of the problem
November 17, 2024 at 2:33 AM
If you also do what I’m doing then you are not part of the problem
Reposted by Luyu Liu
NEW PAPER from me and a wonderful team of collaborators: ✨A Street-Specific Analysis of Level of Traffic Stress Trends in Strava Bicycle Ridership and its Implications for Low-Stress Bicycling Routes in Toronto✨
It's short and it's open access!
#BikeTO #Urbanism
findingspress.org/article/9210...
It's short and it's open access!
#BikeTO #Urbanism
findingspress.org/article/9210...
A Street-Specific Analysis of Level of Traffic Stress Trends in Strava Bicycle Ridership and its Imp...
By Amreen A. Imrit, Jaimy Fischer & 3 more. A street-specific analysis of Level of Traffic Stress trends in Strava bicycle ridership shows a preference for low-stress bicycling routes as well as examp...
findingspress.org
January 19, 2024 at 6:37 PM
NEW PAPER from me and a wonderful team of collaborators: ✨A Street-Specific Analysis of Level of Traffic Stress Trends in Strava Bicycle Ridership and its Implications for Low-Stress Bicycling Routes in Toronto✨
It's short and it's open access!
#BikeTO #Urbanism
findingspress.org/article/9210...
It's short and it's open access!
#BikeTO #Urbanism
findingspress.org/article/9210...