←back to thread

Ask HN: What are you working on? (February 2025)

261 points david927 | 4 comments | 23 Feb 25 23:00 UTC | HN request time: 0s | source

What are you working on? Any new ideas that you're thinking about?
Show context
mavamaarten ◴[24 Feb 25 07:09 UTC] No.43156614[source]▶
I live next to a school, so there's a low speed limit (30 km/h). Still, people drive like race drivers and the city hasn't ever responded to the residents' hopes of introducing a speed camera.

I wanted to have some data on how many people speed, the max speed recorded, that sort of thing. Things the city should be doing after many complaints of dangerous driving and people being almost killed on zebra crossings.

I have a doorbell camera, and by analysing the footage using OpenCV and some code, I can track how fast people drive if you see how fast they move between two known points.

Average speed: 46 km/h :(

replies(15): >>43156678 #>>43156717 #>>43156745 #>>43156800 #>>43156829 #>>43157069 #>>43157443 #>>43157490 #>>43157491 #>>43157679 #>>43157849 #>>43157953 #>>43159077 #>>43159845 #>>43162553 #
1. kylecazar ◴[24 Feb 25 14:22 UTC] No.43159845[source]▶
On my street they installed one of those 'current speed' radar displays to let people know they are speeding.

I've never thought they worked really, but this is a new one. It has very prominent red and blue flashing lights that trigger if you are 5+ over. I've seen countless people slow down immediately, it's that jarring/terrifying

replies(2): >>43161300 #>>43161415 #
2. boogieknite ◴[24 Feb 25 16:19 UTC] No.43161300[source]▶
the side effect is bikers like me will pedal as hard as possible in hopes we can get that light to flash
replies(1): >>43169783 #
3. bdavisx ◴[24 Feb 25 16:28 UTC] No.43161415[source]▶
That's because a lot of those people think it's a "speeding ticket" camera flashing at them.
4. vincnetas ◴[25 Feb 25 09:16 UTC] No.43169783[source]▶
I assume you are talking about cyclists. So in this case i guess it's not a biggie as they are moving the mass of no more than 20kg compared to 2000kg when driving a car. (from safety perspective)