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Show HN: NYC Subway Simulator and Route Designer

85 HeavenFox 5 7/7/2025, 2:13:56 PM buildmytransit.nyc ↗

Hello HN!

As a long term NYC resident, I have read countless articles on ideas tweaking subway services, but always found them hard to follow without visual aid. So over the long weekend I decided to build one. It has all the basic features: trains would spawn at their origin, stop at stations, and slow down if it gets too close to another. You can also design custom routes by piecing tracks together.

Have fun, and let me know what you think!

Comments (5)

darthplagius · 30m ago

I contract out work to MTA, specifically their AI/ innovation teams.

I'm 100% showing this to them today just for fun. They'll get a kick out of it.

kiwibyproxy · 54m ago

Very cool! It would be nice to have a bit more information in the readme about the project structure and e.g. how to adapt it for other cities :)

xnx · 5h ago

Very cool.

Sometimes when I Edit Routes and click an "<- Add" button I get the console error "Uncaught Error: coordinates must be an array of two or more positions" and the page blanks out.

HeavenFox · 5h ago

Thanks - this is likely due to adding two tracks facing each other, i.e.

-->-->-- --<--<--

I'll add some logic to prevent such options from showing up.

pimlottc · 4h ago

This is sadly not mobile friendly in an amusing way; the map controls are nice and legible but they block basically the entire map. If there was a way to minimize them (perhaps automatically), this might work well on mobile.

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