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Danny Yee

@dannyyee.bsky.social
1.5K followers 1.7K following 1.4K posts

Oxford (ex Sydney), books, transport, education, science, mathematics, gamelan. Probably mostly posting about Oxford transport, with the odd book review and some pathological polymathy.

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Danny Yee @dannyyee.bsky.social · 13/10/2026
5.20pm. Woodstock and Banbury still seem clearly worse than the other radials.
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Danny Yee @dannyyee.bsky.social · 13/10/2026
4.30pm and Banbury and Woodstock Rds both clearly worse than Botley Rd. Still school-run traffic?
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Danny Yee @dannyyee.bsky.social · 13/10/2026
3.30pm
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Danny Yee @dannyyee.bsky.social · 13/10/2026
3.15pm on a Tuesday (in uni term, with the schools all in) and Oxford traffic doesn't look terrible.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
And, finally, leaving the underpass to get onto Botley Rd, there is actually some support for transiting from the cycle path / shared path onto the carriageway.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
And then cross Cripley Rd at one of those crossings where it's not clear who has priority. (Someone has suggested closing Cripley Rd to motor traffic, which might free up eough room for a zebra crossing, with a proper cycle bypass, to replace the signal crossing.)
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Danny Yee @dannyyee.bsky.social · 20/09/2026
Then you have to dodge around some poles and utility cabinets, and signal poles, and people waiting to cross the road.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
Cycling from the west and trying to get onto the underpass, you have to exit (without any signs or support) at the Abbey Rd junction, in dogleg movement that no one is going to expect, bumping up a kerb on the way.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
Another oddity: a fake speed hump - white triangles but no actual elevation change - presumably put in to try to get drivers to slow down a little bit.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
I don't know why one side of this has tactiles and a 20mm lip, while the other side has no tactiles but is flush. Are people supposed to transmute between pedestrians and cyclists half-way across?
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Danny Yee @dannyyee.bsky.social · 20/09/2026
And if I'm not confident enough to cycle with 18,000 mv/day on the carriageway, or I'm trying to get to the station, I have to go around this corner on shared space and then cross the station entry with no support.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
Going the other way, if I want to get from the underpass onto the carriageway, do I use the dropped kerb and tactiles provided for pedestrians? This is what most people seemed to do, but this seems likely to create conflict with pedestrians, who will also be looking out for cars and buses.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
Or do I keep going on the carriageway and then do a sideways skip and use this dropped kerb which looks like it has been provided for this?
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Danny Yee @dannyyee.bsky.social · 20/09/2026
But if I'm on the carriageway, on the junction, which side of the 4.4m height sign do I come off the carriageway on - do I use the dropped kerb and tactiles for the pedestrian crossing (green route) or bump up the 20mm kerb to the left of that sign (blue route)?
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Danny Yee @dannyyee.bsky.social · 20/09/2026
I'm on the shared space outside the Frideswide Square shops. Which way do I cycle around this tree?
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Danny Yee @dannyyee.bsky.social · 20/09/2026
The sections with fence rather than wall have some extra effective with, with a bit of space for handlebars, and the fence on the southern side has been offset 0.09m towards the carriageway, which is even better.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
The actual routes under the bridge seemed to work pretty well. There were people walking everywhere, and sometimes cycling on the footpath to get around people on the cycle path, and I heard a few bells being sounded, but there didn't seem like much conflict between people walking and cycling.
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Danny Yee @dannyyee.bsky.social · 20/09/2026
The route under the Botley railway bridge has fully opened, so I went down to see how the walking and cycling provision works. Summary: the route under the railway bridge is pretty good, the transitions on either side are terrible for cycling (and not that good for walking).
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Danny Yee @dannyyee.bsky.social · 11/09/2026
In general, getting onto or off the main cycle tracks is not really provided for. This is "addressed" in some places by simply banning cycle left or right turns from the tracks -- or by providing options that involve cycles turning on a dime.
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Danny Yee @dannyyee.bsky.social · 08/09/2026
The Kent St signals are clearly optimised for cars moving at 40km/hr. After turning east, the Oxford St cycle track is much better - a bit wider and the surrounds are more welcoming. Really needs to be extended along Oxford St.
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Danny Yee @dannyyee.bsky.social · 08/09/2026
The bridge ramp is great, but one design feature seems really poor. The sides of the ramp are flared out, which increases the effective cycling width - handlebars stick out further than wheels. But a handrail has been put in that not only undoes that but goes the other way, sloping inwards!
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Danny Yee @dannyyee.bsky.social · 08/09/2026
The new ones Iffley Rd and Banbury Rd have the entrance kerbs right on the main road too, and the crossings directly on the pedestrian desire line. They really are _much_ steeper than the old treatments and they rise to the level of the footway (I think 850mm, just shy of the 1000mm allowable).
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Danny Yee @dannyyee.bsky.social · 08/09/2026
One of the less convincing pieces of cycling "infrastructure" in Sydney. @bicyclensw.bsky.social
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Danny Yee @dannyyee.bsky.social · 08/09/2026
Extensive Hostile Vehicle Mitigation just to protect the cycle parking (but no dropped kerb to provide inclusive accessibility). Victoria Cross metro station, Sydney. @sydneystations.bsky.social
Footway sloping down away from viewer. Glass doors on left are entry to cycle parking. Complete rows of bollards across the footway and along its edge to the road.
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Danny Yee @dannyyee.bsky.social · 14/08/2026
In many ways Groningen is a better model for Oxford than any of the better known Randstad cities in the west of the Netherlands. It is quite some way from any other significant city and is the main centre not just for Groningen province but for parts of Drenthe and Friesland.
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Danny Yee @dannyyee.bsky.social · 14/08/2026
It has spectacularly good cycling infrastructure, but also a large central pedestrianised area. And these are still being steadily improved on.
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Danny Yee @dannyyee.bsky.social · 14/08/2026
I visited Groningen in May, and was shown around by people from the municipality. The 1977 changes were just the beginning of fifty years of progressively restricting motor traffic to enable walking and cycling.
A newly constructed cycle street - red asphalt, only access motor traffic, very smooth and comfortable to cycle on.A woman presenting to a screen showing "1977 Traffic Circulation Plan".
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Danny Yee @dannyyee.bsky.social · 13/08/2026
That’s nothing!
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Danny Yee @dannyyee.bsky.social · 05/08/2026
This is a bit technical, but the designs we commissioned are here wanderingdanny.com/oxford/consu...
Highway design with protected cycle tracks and movements
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Danny Yee @dannyyee.bsky.social · 31/07/2026
There were 10km/hr speed limits and vehicles mostly not going much faster than that, with the layout -- the street furniture and the people wandering everywhere -- helping to keep speeds down.
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Danny Yee @dannyyee.bsky.social · 31/07/2026
These are laid out as single surfaces with no kerbs and a lot of street furniture scattered around, a bit like a giant woonerf.
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Danny Yee @dannyyee.bsky.social · 31/07/2026
But what about the superblocks? My second thread on walking in Barcelona's Eixample, looking at recent pedestrianisation schemes.
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Danny Yee @dannyyee.bsky.social · 31/07/2026
(The extra space at the corners is mostly used for car parking, though in a few places it has been reallocated for cafe seating, cycle parking, or other uses.)
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Danny Yee @dannyyee.bsky.social · 31/07/2026
Barcelona footways are also flat and don't suffer from "street scars" or other damage that creates trip hazards. (One exception to this are tree beds, which often have a considerable drop from the footway level, perhaps to assist with catching rainwater.)
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Danny Yee @dannyyee.bsky.social · 31/07/2026
(Barcelona's "old city" streets are much like those of any other medieval city core, though they are really nicely laid out and mostly fully pedestrianised - certainly more attractive than Oxford's.)
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Danny Yee @dannyyee.bsky.social · 25/07/2026
At the Hemisfèric in Valencia. Everything in the small gift shop is the kind of stuff you’d expect. And then there are three copies of Mandelbrot’s _The Fractal Geometry of Nature_! (At €26, also the only thing not overpriced.) dannyreviews.com/h/Fractal_Ge...
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Danny Yee @dannyyee.bsky.social · 14/07/2026
Most of the SRETs are much narrower, e.g. 6.5m here (Linton Rd).
Highways diagram of SRET at Linton Rd (North Oxford).
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Danny Yee @dannyyee.bsky.social · 14/07/2026
You can see where the old kerb lines were on this.
highways diagram showing new SRET design for St Margaret's Rd junction with Banbury Rd (Oxford)
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Danny Yee @dannyyee.bsky.social · 20/06/2026
Parasites: The Inside Story dannyreviews.com/h/Parasites.... - worms you don't want to meet
Book Cover: abstract segmented worm (light blue-green with red edging) on a black background; blue-green title "PARASITES" with red subtitle "THE INSIDE STORY", blue-green authors "Scott L. Gardner / Judy Diamond / Gabor Racz" and red "ILLUSTRATED BY BRENDA LEE".
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Danny Yee @dannyyee.bsky.social · 20/06/2026
Capitalists Must Starve (Park Seolyeon) dannyreviews.com/h/Capitalist... - a straightforward biographical novel set in Korea in the 1920s, telling the story of labour organiser and activist Kang Juryong.
Book Cover: red with black text: small "TILTED AXIS PRESS" with logo at the top, title "Capitalists Must Starve" with smallcaps "A NOVEL", "By Park Seolyeon in bottom left and "Translated by Anton Hur" in bottom right.
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Danny Yee @dannyyee.bsky.social · 25/05/2026
The Five Million Year Odyssey: The Human Journey From Ape to Agriculture dannyreviews.com/h/Five_Milli... (my review)
Book Cover: orange with sketches of stone tools as background, large white title "THE FIVE MILLION YEAR ODYSSEY" above white rectangle with small subtitle "THE HUMAN JOURNEY FROM APE TO AGRICULTURE" and below the rectangle medium sized white author's name "PETER BELLWOOD".
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Danny Yee @dannyyee.bsky.social · 08/05/2026
If you need to escape…
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Danny Yee @dannyyee.bsky.social · 28/03/2026
I think walking beats them all, and cycling can move more people than buses (though only a few places does that actually happen)
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Danny Yee @dannyyee.bsky.social · 22/03/2026
_Four Colors Suffice_ is a history of the Four Colour Map Problem, from its origins in 1852 down to its proof in 1976. Along the way it develops enough of the mathematics to give a broad understanding of how the proof works. dannyreviews.com/h/Four_Color... (my review) @princetonupress.bsky.social
Book cover: top quarter red, with binary digits in white and abstract coloured map; second quarter yellow with "Four Colours Suffice" (words in blue, red, and green); rest white with subtitle "how the map problem was solved", "REVISED COLOR EDITION", "with a new foreword by Ian Stewart", and "ROBIN WILSON".  A black stripe along the left side, with "princeton science library" in it.
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Danny Yee @dannyyee.bsky.social · 18/03/2026
Someone reports: these racks are fully uses and there are still a dozen cycles attached to nearby street furniture. This suggests to me that three car parking spaces should have been converted to cycle parking, not just one.
just after 6pm there was one car parked in the car space, 6 bikes on the three bike racks, and 12 bikes chained to posts, railings and street signs nearby. None was using the church bike racks, which are out of sight, behind the church tower. (I can’t imagine many would be happy using them after dark; also these are private bike racks and can’t be used in the same way as the public ones on the highway.)
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Danny Yee @dannyyee.bsky.social · 18/03/2026
Apparently removing even one of the two dozen car parking places in front of the shops will cripple the local businesses.
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Danny Yee @dannyyee.bsky.social · 15/03/2026
Go Paris!
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Danny Yee @dannyyee.bsky.social · 05/02/2026
_How to Drive a Nuclear Reactor_ dannyreviews.com/h/How_Drive_... (my review)
Orange book cover.  Top has text "COLIN TUCKER" (small white caps) and "HOW TO DRIVE A NUCLEAR REACTOR" (larger black caps).  Bottom has black circle with two hands on it (like a steering wheel), with an "atomic" symbol inside it - three black elipses, with white dots on them
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Danny Yee @dannyyee.bsky.social · 21/01/2026
_Children of Mars: The Origins of Rome's Empire_ (Armstrong, @oxfordunipress.bsky.social ) dannyreviews.com/h/Children_M... (my review) - "The Roman Republic was a federation of elite families who worked together for mutual benefit, but in a highly competitive environment"
Book cover.  Battle scene with cavalry.  Text "JEREMY ARMSTRONG" (small upper case, white) above "CHILDREN OF MARS" (large upper case, gold) and "THE ORIGINS OF ROME'S EMPIRE (small upper case, white).
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Danny Yee @dannyyee.bsky.social · 12/01/2026
Richard Davis' _Religions of Early India: A Cultural History_ (@princetonupress.bsky.social) offers a nice combination of broad themes and illustrative details, in their social and political contexts. dannyreviews.com/h/Religions_... (my review)
Orange book cover.  Inset white rectangle containing large white "Religions of Early India", smaller "A CULTURAL HISTORY", above a black and white carving and w
hite "RICHARD H. DAVIS".
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