Live data from Hacker News

200k Flemish drivers can turn traffic lights green

vrt.be

11–20 of 190 posts

Re: 200k Flemish drivers can turn traffic lights green

#11
post #6

"We want to be present on the apps that people already use" How can they not see that an app for traffic lights is clearly the wrong approach? Smart traffic lights are working great in many countries without needing an app for them to work.

I guess they just want to collect movements of all their citizens, and this is their way to get at the data.

Re: 200k Flemish drivers can turn traffic lights green

#12
post #9

In Melbourne, Australia, a long time ago, they embedded weight sensors in the road for a lot of intersections, so they can react dynamically to traffic conditions. I live in Berlin, which doesn't have such sensors and it's always frustrating waiting for lights to change when there's no traffic.

Are you sure they're using weight sensors? AFAIK wire loops seem much more useful, plus they have the advantage of also picking up bikes and other lightweight traffic more accurately.

I can also tell you that even in a country with sensors all over the place, I do sometimes end up waiting on an intersection with no traffic. I assume it's some kind of public transportation/emergency vehicle priority system activating, or maybe it's an attempt to calm traffic downstream where loads of traffic has piled up already so intersections don't get blocked.

Either way, adding sensors doesn't necessarily make traffic lights immune to unnecessary waiting times.

Re: 200k Flemish drivers can turn traffic lights green

#13
I have no idea why the app is required here. Cars & bikes are massive, hot, & mobile objects. They're perfect for a modest-cost IR sensor atop the traffic light to detect them and adjust the lights accordingly. This type of system is commonplace in cities in the UK and works effectively.

Having drivers reach for their phone when they're approaching traffic lights - common pedestrian crossing points - is categorically moronic.

Re: 200k Flemish drivers can turn traffic lights green

#14
post #6

"We want to be present on the apps that people already use" How can they not see that an app for traffic lights is clearly the wrong approach? Smart traffic lights are working great in many countries without needing an app for them to work.

Belgium has intelligent traffic lights already. You can't use an app system like this without existing smart traffic light infrastructure.

This just allows for better traffic flow management by predicting influxes of traffic along long roads.

But, more importantly, it allows traffic planners to analyze popular sources/destinations on the road map. If 90% of cars turn left at a certain traffic light but only because the traffic light before it takes forever to turn green, they can tweak the scheduling to divide traffic more evenly.

The obvious downside, of course, is that this data will quickly show individuals when analyzing patterns in remote areas.

Re: 200k Flemish drivers can turn traffic lights green

#15
post #3

Earlier quoted context omitted.

Note that here they are working via phone apps, so if you are navigating with a local navigation app like Karta GPS, Flitsmeister or Sway, these apps can let the lights know you are heading that way and will be there in X minutes. Therefore this approach is not _really_ car centered and also works for bikes or any alternative form of transportation. If I read between the lines of the article, the system was developed…

That seems an over-engineered, highly expensive and complicated to maintain on a road-lifetime scale system

Taxi drivers might have said the same thing about Uber.

These days, many dishwashers, refrigerators, coffee machines etc. routinely connect to the internet. The tech is well established, and projects like this become possible precisely because they’re not that complicated to build or maintain. They take advantage of common infrastructure, and can often be cheaper than supposedly “simpler” alternatives.

Re: 200k Flemish drivers can turn traffic lights green

#16
post #6

"We want to be present on the apps that people already use" How can they not see that an app for traffic lights is clearly the wrong approach? Smart traffic lights are working great in many countries without needing an app for them to work.

Everyone wants you to install their app these days. Install my app to turn on the lights, install the app to see the menu at a restaurant, install the app to read information about an archaeological site, install an app to open the automatic doors.

As you said, it's 100% the wrong approach.

Re: 200k Flemish drivers can turn traffic lights green

#17

I have no idea why the app is required here. Cars & bikes are massive, hot, & mobile objects. They're perfect for a modest-cost IR sensor atop the traffic light to detect them and adjust the lights accordingly. This type of system is commonplace in cities in the UK and works effectively. Having drivers reach for their phone when they're approaching traffic lights - common pedestrian crossing points - is categorically…

I actually assumed that this is because the system tries to figure out where you will be by your planned route. so seeing the bike coming up is much later - for example when the bike will be coming around a corner

Re: 200k Flemish drivers can turn traffic lights green

#18

I have no idea why the app is required here. Cars & bikes are massive, hot, & mobile objects. They're perfect for a modest-cost IR sensor atop the traffic light to detect them and adjust the lights accordingly. This type of system is commonplace in cities in the UK and works effectively. Having drivers reach for their phone when they're approaching traffic lights - common pedestrian crossing points - is categorically…

That's not how it works - the idea is your navigation app signals the lights in advance. If you will reach red lights in 1km, the app signals this and the lights will be green before you're there, so you don't need to slow down.

Re: 200k Flemish drivers can turn traffic lights green

#19
post #9

In Melbourne, Australia, a long time ago, they embedded weight sensors in the road for a lot of intersections, so they can react dynamically to traffic conditions. I live in Berlin, which doesn't have such sensors and it's always frustrating waiting for lights to change when there's no traffic.

Are you sure they're using weight sensors? AFAIK wire loops seem much more useful, plus they have the advantage of also picking up bikes and other lightweight traffic more accurately. I can also tell you that even in a country with sensors all over the place, I do sometimes end up waiting on an intersection with no traffic. I assume it's some kind of public transportation/emergency vehicle priority system activating,…

From what I've heard, they don't always use the sensors; sometimes they're on a fixed schedule during the day and on request only overnight. Or they might be a fixed schedule always; a classmate at uni did a project around modelling traffic flow and found an intersection or two that turned out to be configured differently from how the council expected; probably a setting that was changed once and never revisited.

Re: 200k Flemish drivers can turn traffic lights green

#20
post #15

Earlier quoted context omitted.

That seems an over-engineered, highly expensive and complicated to maintain on a road-lifetime scale system

Taxi drivers might have said the same thing about Uber. These days, many dishwashers, refrigerators, coffee machines etc. routinely connect to the internet. The tech is well established, and projects like this become possible precisely because they’re not that complicated to build or maintain. They take advantage of common infrastructure, and can often be cheaper than supposedly “simpler” alternatives.

> These days, many dishwashers, refrigerators, coffee machines etc. routinely connect to the internet. The tech is well established

And as a side effect, we get very funny cyber-security news weekly!

Post reply on HN