Writing to you from a long distance train table, probably. Australian, currently a postdoc at UZH, Zurich 🇨🇭, in Urban Analytics.
Interested in access, walkability, sustainable transport in general, open source urban analytics. Transport cyclist, climber, mum, mostly plant based.
| Personal page | https://josephineroper.com/ |
| Publications | https://www.researchgate.net/profile/Josephine-Roper |
| Github | https://github.com/JosephineRoper/THERE |
| Climbing by bike and foot, Sydney and surrounds | https://carlesscragging.wordpress.com/ |
A deep-dive into Zurich's green tram tracks: https://storymaps.arcgis.com/stories/fb3b2c846a1d43ac853fa03c906ba3b1
Not my area nor my students, but I'm really loving working with the students at all levels here at @uzh, they're so engaged and sincere about what they're doing.
On this very conservative report you can easily make the economic case for a default speed limit of 30km/h and for a maximum speed of 50km/h on inner city arterials (not pedestrian separated motorways) on crash costs alone.
The Amenity and reduced severance benefits are staggering. These are VC investment type numbers. Who wants to invest in a startup that switches 50km/h signs to 40km/h signs on roads adjacent to major trip generators for 6800% return?
Reduced severance benefits would be much larger for people on bicycles just due to the extra distance you can travel on a bicycle you are cut off from more possible services you could otherwise have had access to and that isn't included in these numbers
Something the report also pointed out which makes this report even more conservative in it's estimate of travel costs: "We note that there has been some recent debate around whether it is reasonable to value very small changes in travel time for motorists and freight (i.e. a one-minute increase in journey time on an average commute time of one hour) given these variations are likely within the ranges of typical variability in journey times making them relatively imperceptible. It could be argued on this basis that there is a
threshold below which travel time costs are irrelevant and should not be valued."
First time trying #OSRM for routing, as my previous OSMNx + Pandana setup was failing at building a road network for all of Australia.
Jeez it was a PITA to set up but so fast once you get there! National SA2 OD matrix ran in a few seconds.
Roadspace Allocation between Autos, Buses, and Bicycles with Heterogeneous Demand
Recently published Gao, Yang, Andres Fielbaum, David Levinson (2026) Roadspace Allocation between Autos, Buses, and Bicycles with Heterogeneous Demand. Transportation Research part A. Volume 205, March 2026, 104884. [doi][share] The allocation of road space among different transport modes has long been a key issue in urban planning, yet it lacks solid theoretical foundations. This paper…
It was 9:01 so she's probably rushing to drop off before getting to work.
I should probably not try to personally persecute the #WarOnCars at kita. I need friends, and my withering looks seem ineffective anyway! The fact 90% of parents turn up on bikes or foot should be enough social pressure already.
Me: glaring at a car going too fast on the shared streets in the university campus next to the kita (daycare)
.... turns out to be driven by a fellow parent who smiles and waves at me 🫣
Whoops! Had to ride home (just 10 mins) with the lil head bobbling on my back as he'd completely passed out from our morning activities.
As any parent can guess, he woke up when I tried to carry him in and refused to nap again...
I think we need one of those comfy looking bike trailers 😁
Jesse
David M. Levinson ⁂
Ketan Joshi