SpeedAlert: a tool with an overlay that alerts you when overspeeding.

surfer63

Geoff_T
I tested with the B3180 in Overpass. It has 30 mph inside town (West Hill, Higher Metcombe) but misses a speed tag for the "rural" part of the road. There is nothing.
So yes, the data is not good enough (not extensive enough).

Go to https://overpass-turbo.eu/
Use this query:

[out:json][timeout:50];

way
  ["highway"]
  ["maxspeed"]
  ({{bbox}});

out tags center;

Use an area not too big and not too small, and you will get "dots" which you can click to see the speed limit tags.

However, I saw some weird tagging on several roads in that area, and some roads that have been tagged by users wanting to update their neighborhood, but they did it not very "professional".

Geoff_T

surfer63
Thanks for the link. Quite interesting to see what data is there and, more importantly, what isn't. It seems to confirm that the local data just isn't good enough to use reliably. Many of the tags didn't seem to be on the actual road they applied to, and there were plenty of inaccuracies and many areas missing any tags. It's the smaller roads that really need the accurate data as they are the ones that aren't always obvious what the speed limit is.

So for us in the UK we won't be able to take advantage of your great app which is a shame.

surfer63

Gwinambele
Well, it was actually very simple, now that I made the other overlay with image/text (my MediaOverlay).
Day mode:

Night mode:

Additional setting to switch between textmode and speedsign mode:

Give me some days to test as I do not exactly know when I can use my car again and I do not want to publish this without some testing.
(Note that above partial screenshots are either from my emulator or from my phone)

surfer63

Geoff_T So for us in the UK we won't be able to take advantage of your great app which is a shame.

The UK is not consistent. Around the big(ger) cities it is quite alright. If you scroll to Exeter or Plymouth for example, you will find more extensive and better tagging.

Geoff_T

surfer63

I am currently using an app called Map Speed Limits from Google Play.

It is not as good as your app in that it doesn't show your current GPS speed (they have a different app for that) just the current speed limit. It also has have trouble recognising my subscription half the time so shows me a coffee cup instead of the speed limit! But, when working, it does correctly pick up the speed limit on 99% of the roads I have ever driven in the UK. I have discovered that it uses OpenStreetMap which also seems to be a community run free system to get the speed limit. I have no idea how it all works "under the hood" but just wondered if there was a possibility of adding that to your list of speed limit sources for the UK?

I would be happy to beta test anything you want to try , if you had the time and/or inclination to experiment with it.

EDIT I've just noticed that in the logs you are already using openstreetmap.fr so maybe it just needs the UK version adding which seems to be https://www.openstreetmap.org/?

EDIT 2 For the same stretch of B3180 we looked at above this is the link for OSM

https://www.openstreetmap.org/way/37686770

That gives the limit as "GB:nsl_single" which I presume is GB National Speed Limit for single carriageway which is 60.

Gwinambele

surfer63 for me personally sign with speed limit alone is more then enough because i have gps speed from other source (agama car launcher)
i guess its not hard to make it switchable option

surfer63

Gwinambele
Ok, ok.
We now have the following setting:

If you switch it ON, you get a second setting behind it (which remains hidden when you use the textual overlay).

So when we also switch that second switch to On, we then get only a road sign type of warning:

(again from my emulator. I hope to test tomorrow)

Gwinambele

Perfect.

RedCar

rumot
I have this problem, too.

surfer63

Geoff_T

That other program, which I didn't know, is a paid program running on open source data. Annoying. It might be using openstreetmap data, but I really don't think it is using openstreetmap directly. That is not how openstreetmap APIs are organized. There are very inefficient for these kind of things, and very efficient when it comes to "complete map data" copying or maintaining.
For that reason I use overpass queries.

Geoff_T EDIT I've just noticed that in the logs you are already using openstreetmap.fr so maybe it just needs the UK version adding which seems to be https://www.openstreetmap.org/?

What you see is actually overpass acting on openstreetmap data. If you look at my code, you can see that I use a number of servers as these open-source servers contain the same data, but are quickly overloaded, so I "hop" to the next.

Geoff_T

surfer63 When looking at the UK. Coverage of max speed limit tagging is very inconsistent in the UK. In and around big(ger) cities it is quite good. If you move to rural, less dense populated areas it get worse, if not to say: far worse.

Yes, I noticed that even looking at openstreetmap data directly for that stretch of the B3180 although it had "GB:nsl_single" as maxspeed:type it didn't actually have an entry for maxspeed so would need to be worked out from knowledge of the UK speed limit system.

rumot

DUDU-Meng
Hello friend,
Is there any news about the problem with the SpeedAlert app?

surfer63

rumot
No, like mentioned in this post, I asked @DUDU-Meng what he was going to repair. Note also that I mentioned that beta-testers, like I am myself, do not seem to have an issue.
We are one or a couple of beta versions ahead of what Dudu publishes openly for all other users.
And now I am waiting for @DUDU-Meng's reply.
There is nothing I can repair. Either it is in Dudu or google themselves introduced a bug in their SoundPool.
It is designed not to interfere with other sounds. There is nothing I can do.

DUDU-Meng

surfer63 This is actually an issue with FYT. After manufacturing the 7870, the mixing logic for all navigation channels on FYT platforms was changed. Only apps on the designated list are recognized as navigation apps; otherwise, mixing cannot be achieved.

rumot

I understand, my DUDUOS version is 260131. Tomorrow I'll install DUDUOS version b3 and see if anything changes.

DUDU-Meng

rumot

surfer63
SpeedAlert has been added to the mix list,
allowing you to lower the music volume just like a regular navigation app.

https://drive.google.com/open?id=1pPeJQudS_qopfbnaj19PznxruU3ernfI&usp=drive_fs

rumot

DUDU-Meng Thank you very much! Professional approach to the problem. Thank you very, very much.

rumot

DUDU-Meng Thank you very much! Professional approach to the problem. Thank you very, very much.

RedCar

DUDU-Meng
Does this change solves the problem that the tone of my onboard FM-Radio will be switched of in case SpeedAlert outputs an overspeed warning?

surfer63

DUDU-Meng This is actually an issue with FYT. After manufacturing the 7870, the mixing logic for all navigation channels on FYT platforms was changed. Only apps on the designated list are recognized as navigation apps; otherwise, mixing cannot be achieved.

I still don't understand. On the 7862 and models before that, I changed a lot in the mixing logic. The mixing logic applies to the following media (audio) channels:

| Channel        | Stream constant         | Used for                              |
|---------------|------------------------|----------------------------------------|
| Media         | STREAM_MUSIC           | music, video, games, podcasts          |
| Ring          | STREAM_RING            | incoming call ringtone                 |
| Notification  | STREAM_NOTIFICATION    | alerts, messages                       |
| Alarm         | STREAM_ALARM           | alarms & timers                        |
| Voice call    | STREAM_VOICE_CALL      | phone calls & VoIP                     |
| System        | STREAM_SYSTEM          | UI sounds (clicks, locks)              |
| DTMF          | STREAM_DTMF            | dial pad tones                         |
| Accessibility | STREAM_ACCESSIBILITY   | screen reader & accessibility audio    |

As you can see SoundPool, what I use, is not part of that. And as explained earlier: that is exactly how Google designed it.
It should always output its sound, no matter what Android does (unless you have muted all output).

As user @rumot now experiences issues, then why is that?
I really don't understand.

rumot

RedCar This change ensures that the FM radio sound will not be disabled when using SpeedAlert.

DUDU-Meng

RedCar
Yes, that issue has been resolved.

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