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Evan Siroky

@evansiroky

Dad, Transit Data at Caltrans (posts not representative of my employer), YIMBY, multimodal transport, timezone mapper, OpenStreetMap enthusiast, skiing.

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11.09.2024
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Latest posts by Evan Siroky @evansiroky

The plans for the Sacramento Station District look really cool: www.cityofsacramento.gov/content/dam/...

11.02.2026 17:28 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

timezone-boundary-builder and node-geo-tz have been released with 2025c data.

13.01.2026 18:06 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Nope, not backwards compatible

05.01.2026 06:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
View from a chairlift with snowy weather

View from a chairlift with snowy weather

Solid storm this weekend

05.01.2026 06:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm wondering whether the Asia/Hanoi timezone needs to be constructed using Open Historical Map data.

03.01.2026 07:40 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
SB125 Transit Data Scientist Looking to make a difference? Join our strong and mighty workforce. We offer benefits and growth opportunities and impact the lives of millions of Californians.

New Year: New Job?

I'm hiring two Transit Data Scientists to work on SB125 and other transit programs with me at CalSTA

calcareers.ca.gov/CalHrPublic/...

02.01.2026 21:44 πŸ‘ 11 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0
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GitHub - BlinkTagInc/gtfs-to-chart: Generate stringline charts from GTFS transit data Generate stringline charts from GTFS transit data. Contribute to BlinkTagInc/gtfs-to-chart development by creating an account on GitHub.

github.com/BlinkTagInc/...

02.01.2026 20:19 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I have said this before, but I do wish one prominent tech YouTuber would do a BTS tour with a transit agency, showing off all the tech that makes its stuff work. Even just the various systems on a bus today is wild. It'd go a long way to help the image of public transit.

02.01.2026 14:44 πŸ‘ 42 πŸ” 8 πŸ’¬ 1 πŸ“Œ 1
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timezone-boundary-builder milestone: 1000 GitHub stars

15.09.2025 14:10 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
City Councilman Unearths Magical Zoning Amulet

City Councilman Unearths Magical Zoning Amulet

City Councilman Unearths Magical Zoning Amulet
theonion.com/city-co...

08.05.2025 14:00 πŸ‘ 3220 πŸ” 281 πŸ’¬ 54 πŸ“Œ 45
SB 5501 Washington State Legislature

The WA House just approved SB 5501, which prohibits employers from requiring driver's licenses as a condition of employment, unless driving is an essential function of the job. It passed 61-36. This bill is headed to the Governor's desk!
app.leg.wa.gov/billsummary/...

09.04.2025 22:03 πŸ‘ 280 πŸ” 34 πŸ’¬ 4 πŸ“Œ 2
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Protections for nesting gulls (among other uniquely Californian headaches) delayed repairs to Santa Cruz wharf Repairs on the wharf, damaged by last winter’s storms, were delayed by strict permitting requirements, environmental litigation.

I feel like Santa Cruz has so many examples. Most recent being a group uses CEQA to delay wharf restoration and then wharf collapses before repairs can finish: www.mercurynews.com/2024/12/28/p...

27.03.2025 16:22 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Sad state of affairs in transportation safety.

31.01.2025 01:24 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

This new administration is putting safety as its last priority.

30.01.2025 18:52 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A construction site with some walls around the site

A construction site with some walls around the site

Construction update. No idea what these huge walls are for or if they're temporary.

29.01.2025 17:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Boom Supersonic XB-1 breaks sound barrier over Mojave Desert About 35,000 feet (10,670 meters) over the Mojave Desert, northwest of Los Angeles, Boom Supersonic's XB-1 became the first privately funded airplane to break the sound barrier during a test flight on Tuesday.

About 35,000 feet over the Mojave Desert, northwest of Los Angeles, Boom Supersonic's XB-1 became the first privately funded airplane to break the sound barrier during a test flight reut.rs/3E9xfO4

28.01.2025 22:04 πŸ‘ 124 πŸ” 21 πŸ’¬ 7 πŸ“Œ 3

I'm not getting worked up about this one at all. I've known for a while that Google Maps invests a lot in localization to the extent of even drawing borders differently based on where a device accesses Google Maps from.

28.01.2025 21:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Chart showing projected increase in the percent of population that are older adults in the San Francisco Bay Area Counties.

Chart showing projected increase in the percent of population that are older adults in the San Francisco Bay Area Counties.

And the growing percent of people that are older adults is a trend that is projected to continue.

28.01.2025 00:41 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Map of percent change in older adult population in San Francisco Bay Area from 2010-2022. Shows most of the bay had an increase in older adults.

Map of percent change in older adult population in San Francisco Bay Area from 2010-2022. Shows most of the bay had an increase in older adults.

The SF Bay area is aging. Map from MTC's 2024 Coordinated Plan: mtc.ca.gov/digital-libr...

28.01.2025 00:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The people colluding to create housing shortages in order to jack up the price of homes and rent are mostly single family homeowners, not nefarious corporate actors; and they’re doing it in public at your local planning commission, not in smoke-filled conference rooms or whatever.

24.01.2025 18:20 πŸ‘ 684 πŸ” 111 πŸ’¬ 18 πŸ“Œ 12
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President Trump Sworn into Office, Issues Significant Executive Orders - Passenger Transport On Jan. 20, Donald Trump was sworn into office as the 47th President of the United States. On that day, he issued a record-setting 26 Executive Orders (EOs) to immediately advance his Administration’s...

Good article summarizing some of the executive orders that may impact transit from @apta-info.bsky.social. aptapassengertransport.com/president-tr...

23.01.2025 22:31 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Trump kicks off potentially messy fight over Biden’s infrastructure money One of Trump's executive orders could imperil billions in funding for projects that states have already begun working on, some experts said.

Trumps executive orders "could imperil billions of dollars in funding for projects that states have already begun working on... for everything from roads and bridges to broadband and withstanding the effects of climate change."

This could get messy. h/t @yfreemark.bsky.social

22.01.2025 14:26 πŸ‘ 66 πŸ” 22 πŸ’¬ 4 πŸ“Œ 5

OpenStreetMapping intensifies... if I can figure out how to add this as a custom layer.

22.01.2025 00:34 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Release 2025a Β· evansiroky/timezone-boundary-builder Zone Changes Update to latest OSM data

timezone-boundary-builder release 2025a is now live: github.com/evansiroky/t...

21.01.2025 06:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

One of these days I may need to go to Doklam myself to figure out what timezone they really observe over there.

20.01.2025 06:22 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

With this hack now you have to worry about daylight savings time transitions happening at the incorrect time!

20.01.2025 02:59 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Very interesting edge case! But I think there may be ambiguity on whether additional hours digits beyond just 2 could be accepted. The spec says one digit for hours is valid, so maybe more than 2 should be accepted as well? You should start a GitHub issue to discuss!

20.01.2025 02:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
- tz - lists.iana.org

The real action for timezone banter remains on the listserv: lists.iana.org/hyperkitty/l...

17.01.2025 03:05 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Hard to say for sure whether people are connecting the dots that housing costs are a source of economic discontent. However, I think there's plenty of evidence we're materially worse in what we get for housing, see this evidence for example: bsky.app/profile/kevi...

17.01.2025 01:11 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0