TJ

@tjtjtj

transportation nerd, accessibility advocate • they/them • also see:

664 Siguiendo326 Seguidores868 Publicaciones

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TJ@tjtjtj· 9d

Absolutely not compression artifacts, that wouldn’t explain the different pixel sizes. As I mentioned, the images have a SynthID watermark from OpenAI, meaning they are certainly AI-generated. (Unlike other “AI detection tools” which basically just guess, SynthID watermarks are deterministic.)

Positive OpenAI SynthID watermark check for an asset on the oneraccoonaway website

TJ@tjtjtj· 9d

It still does, just zoom in a bit. No coherent/consistent pixel sizes and a splotchy mess.

AI-generated pixel art of a leafy plant against a blue sky, showing characteristic failures of the style. The pixel grid is inconsistent — block sizes vary across the image and drift out of alignment, so leaf edges break into partial pixels and irregular stair-steps instead of clean hard-edged shapes. The palette is unconstrained, using dozens of nearly identical greens and yellow-greens in soft gradients rather than a small deliberate set of colors. Dark leaf outlines fade in and out of existence mid-stroke instead of holding a consistent one-pixel weight, and a stray patch of blue appears inside the foliage at the bottom center where background has bled through.

AI-generated pixel art of the Seattle Space Needle against a pale blue sky, showing characteristic failures of the style. The pixel grid is inconsistent across the image, with blocks of differing sizes that don't align to a shared lattice — most visible along the saucer's curved underside, where the stair-stepping is uneven rather than following a deliberate anti-aliasing pattern. The two support legs dissolve into smeared, ambiguous shapes where they meet the deck, and the structural lattice below has no coherent repeating pattern. Colors are blended in continuous gradients rather than drawn from a limited palette, so shading transitions blur instead of stepping cleanly between defined tones.

TJ@tjtjtj· 11d

and the lack of attention to detail bugs me too... why are the 1 and 2 Line colors/shapes like this? any transit nerd would have immediately caught this.

Next arrivals for 1 and 2 Line where 1 Line is represented by a brown square and 2 Line a purple square

TJ@tjtjtj· 14d

Screenshot of a quote tweet. The original post, from @RaxKingIsD… dated Mar 5, reads: "i like the whole gondor/mordor thing. all cities should have an evil version right across the river, like DC and arlington." Quoting it, EDEN (@adoeable) posted a map of the Seattle area on Mar 10 with "Seattle" and "Bellevue" each scribbled over in red circles, separated by Lake Washington and connected by I-90. The post has 309 replies, 3.8K reposts, 91K likes, and 4.4M views.

TJ@tjtjtj· 21d

my solution is to make agents snitch on themselves; I put this (1st screenshot) in my PR template, tell them to follow it exactly in AGENTS/CLAUDE[.]md, and it's produced good results so far (2nd/3rd screenshots). the goal is to better understand the roles of the agent and human involvement

AGENTS: If you are an agent opening this PR, write a few sentences below explaining to what extent you were involved in making these changes. This kind of context is helpful for maintainers to understand the contributions and how they were made. For example: Did the user review your changes manually? Iterate on it with you? One-shot a prompt then open the PR without reviewing it themselves? How much context were you given about the proposed changes?

AI involvement: The user hit the bug while bringing up a hyphenated feed code on their own deployment, walked through the diagnosis with me (Claude Code), then asked me to draft this PR. The root cause and fix were proposed by me, reviewed by the user, and the user confirmed the original symptom and the fix on their deployment. The PR text and commit message are mine; the user reviewed before opening.

Codex investigated the live OneBusAway and Transit Tracker responses, traced the filtering behavior, implemented the fallback logic, added regression tests, and ran the test suite and production build. The user supplied the original observed behavior, reviewed the proposed behavior, tested the branch on a Raspberry Pi server deployment, and challenged the initial handling of scheduleDeviation, leading to the stricter same-trip validation.

TJ@tjtjtj· 23d

I never want to see this UI element ever again

green dot with monospace text "LIVE" next to it

TJ@tjtjtj· 25d

It shows the provenance information if you select “view details”

Generated with OpenAI tools

This content was generated using OpenAI tools. The signals below provide supporting evidence for this result.

SynthID detected
We found a SynthID watermark that originated from OpenAI.

TJ@tjtjtj· 25d

this is an AI-generated map; the information doesn't look incorrect, but it's better to link the actual source (I don't know why whoever generated this couldn't just take a screenshot?): mapresearch.org/equality/

Screenshot of OpenAI's SynthID verification tool with the map from the parent post uploaded:

"Generated with OpenAI tools

This content was generated using OpenAI tools. The signals below provide supporting evidence for this result."

TJ@tjtjtj· Jul 3

this is incredibly strange, my (Chromium-based) browser apparently has a built-in style to hide `.scad` elements, so the name isn't appearing in the table. what the hell

screenshot of the page linked in previous post with devtools open selecting the element for the link to pride-braid-triple-stand.scad. the link is missing from the table and its element has the class name "scad" applied, devtools shows there is a user-agent stylesheet for scad-class elements applying display: none. this is annotated with a red arrow and low-quality jpegged eminem reaching out his hand with a question mark next to him

TJ@tjtjtj· Jul 1

Plex reviews for The Boy in the Striped Pajamas. User mickerdoo gives it 5 stars: “The perfect way to bring hate and violence into perspective… Through the eyes of a child. A masterpiece of writing.”

matildaabbott replies: “It won’t let me watch it”

TJ@tjtjtj· Jun 19

It also has a SynthID watermark

Screenshot of the image in the previous post uploaded to the OpenAI SynthID verification page which says “Generated with OpenAI tools. This content was generated using OpenAI tools. The signals below provide supporting evidence for this result.”

TJ@tjtjtj· Jun 11

woah, King County Metro is reporting occupancy in their GTFS-RT data now. I can't speak to its accuracy yet, but it's cool they added it

Screenshot of the Transit app showing real-time tracking for Sound Transit Route 545 heading to Redmond. The bus is 7 stops away from the user's location at 4th Ave / Pike St, with an estimated arrival of 32 minutes, and currently has open seats and is accessible. The bus (vehicle #9648) was updated 54 seconds ago and is shown with a 54-second countdown on the map near the Capitol Hill/Belltown area of Seattle.

TJ@tjtjtj· Jun 4

Even a small reduction in speed dramatically improves outcomes for collisions. Unless you enjoy traffic violence, drive the speed limit. www.ite.org/technical-re... (Also: this is in Bellevue, WA, USA. Not sure where you got Canada from.)

Infographic showing pedestrian fatality rates by vehicle speed. At 20 mph, 90% of pedestrians survive a collision and 10% die. At 30 mph, 60% survive and 40% die. At 40 mph, only 20% survive and 80% die.

TJ@tjtjtj· May 26

Write out a quick bodge and we have something that parses the archive into something usable.

Screenshot of a terminal showing "Live activity updated" with a JSON object containing "leaveTime", "tripDepartureTime", "routeName", and "routeColors" with light and dark variants.

TJ@tjtjtj· May 26

And we can get the route color by looking at the background color metadata (which is helpfully in a JSON blob near the end of the archive). Same deal: look for this pattern, extract and convert the color values.

Screenshot from the text view of a hex editor, with the text highlighted: "{"backgroundTintColor":[0.6354607,-0.061623164,0.14334208,1]}"

TJ@tjtjtj· May 26

This format is proprietary and would take a fair bit of effort to fully reverse-engineer (digging into private frameworks and such), but there is a shortcut we can take: the accessibility descriptions are baked in. All we need to do is look for this specific pattern, no complex parsing needed.

Screenshot from the text view of a hex editor, with the text highlighted: "Go in 9 minutes, B, in 18 minutes, Arrive at 9:52 AM, 23 min"

TJ@tjtjtj· May 26

So how does it actually work? Transit does not offer any official interface for this sort of thing, and it's basically impossible without a jailbroken iPhone to read data from third-party apps. Recent versions of macOS include a Continuity feature that mirrors iPhone Live Activities, shown here.

Screenshot of the macOS menu bar with a mirrored iPhone Live Activity from Transit App. The small variant of the Live Activity is displayed in the menu bar, and the large variant (with more information about when to leave and ETA) is placed below.

TJ@tjtjtj· May 26

I love using @transit.app's GO Live Activity to keep tabs on when I should leave, but I always wished it was more glanceable while my phone is on the charger and I'm scrambling to get ready. The solution: make it mirror to my Transit Tracker!

TJ@tjtjtj· May 8

fun fact: all the calculations happen client-side, there is no routing server! this was a fun challenge to implement and optimize. at build time it generates a bunch of GeoJSON tiles representing the transportation network, then the client pulls only the tiles it needs to build a graph around stops

Screenshot of a text editor at the file "static/tiles/11/323/712.geojson". The contents of the file are a GeoJSON document with many coordinates and LineString features.

TJ@tjtjtj· May 8

it now calculates walk-time isochrones instead of a static radius around each stop - you can change it based on how long you're willing to travel from the destination stop

TJ@tjtjtj· May 7

if you live in the Seattle metro area and want to find a reason to take new bus routes then boy have I built the tool just for you: go-by-bus.horner.tj (featuring @transit.app's web planner)

TJ@tjtjtj· Apr 30

so true Dan Toomey from Good Work www.youtube.com/watch?v=XuAD...

TJ@tjtjtj· Mar 28

Train day

A Sound Transit Link light rail train stopped on an elevated track, with a line of passengers walking along the platform beside the train; city buildings are visible in the background.

A large poster reading “I’M EXCITED TO TAKE THE CROSSLAKE CONNECTION TO…” covered in dozens of colorful handwritten sticky notes, set up outdoors at a community event under a tent.

An outdoor bike parking area filled with tightly packed bicycles of many styles, including child seats and cargo bikes, with recycling and compost bins in the foreground and trees in the background.

TJ@tjtjtj· Mar 26

lookin like this

stock photo of a stereotypical "thief" holding a green bag over their shoulder wearing a white and black striped shirt, black gloves, a beanie, and an eye mask.

TJ@tjtjtj· Mar 25

ESPECIALLY this one. what the hell

Call queryObjects(Constructor) from the console to return an array of objects that were created with the specified constructor. For example:

queryObjects(Promise). Returns all instances of Promise.

queryObjects(HTMLElement). Returns all HTML elements.

queryObjects(foo), where foo is a class name. Returns all objects that were instantiated via new foo().

The scope of queryObjects() is the currently-selected execution context in the console.

TJ@tjtjtj· Mar 20

map of united states with speech bubble pointing to every individual state which says "all the people from [other state] have moved into [my state]

TJ@tjtjtj· Mar 9

apparently in zsh [ is a builtin

zsh prompt running command "which ["
output is "[: shell built-in command"

TJ@tjtjtj· Mar 9

well I'll be damned

bash shell running command "which ["
output is "/bin/["

TJ@tjtjtj· Feb 25

it also says Feb 25 for me in the US. either the email or text here is wrong. I'd have to assume they intended to push this change out by today but the timeline got pushed back and they forgot to change the date

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TJ@tjtjtj· Feb 25

moving the body of the effect into the map's onLoad fixes it