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Re: [sumo-dev] Retrieving the type of Junction
  • From: Adrien Dubedat <adrien.dubedat@xxxxxxx>
  • Date: Thu, 4 Nov 2021 20:24:44 +0000
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  • Thread-topic: [sumo-dev] Retrieving the type of Junction

This a simple JSON file I created while running SUMO.

In there, I write the traffic light ID and then the controlled lanes ID in that traffic light.

However, I don’t see the format you were mentioning in your previous email.

 

I also tried to go through the list of controlled links but it’s the same format.

See the second file attached.

 

I’m guessing this is because the naming convention in the osm.net.xml file might not be correct ?

 

This is how a junction is defined in the osm.net.xml file:

 

<junction id="10018180" type="dead_end" x="9550.31" y="6845.42" incLanes="260842179_0" intLanes="" shape="9549.40,6845.01 9551.22,6845.82"/>

 

Thank you for your help,

Adrien

 

De : sumo-dev <sumo-dev-bounces@xxxxxxxxxxx> De la part de Jakob Erdmann
Envoyé : Wednesday, November 3, 2021 6:11 PM
À : sumo developer discussions <sumo-dev@xxxxxxxxxxx>
Objet : Re: [sumo-dev] Retrieving the type of Junction

 

You can use traci.trafficlight.getControlledLanes and getControlledLinks

Lanes with ids of the form :<JUNCTIONID>_w<index>_0 are walkingareas

Lanes with ids of the form :<JUNCTIONID>_c<index>_0 are crossings

 

The index in the result lists corresponds to the index in the phase state.

 

regards,

Jakob

 

 

Am Mi., 3. Nov. 2021 um 20:10 Uhr schrieb Adrien Dubedat <adrien.dubedat@xxxxxxx>:

Hi Jakob,

 

Thank you for your reply, I only just see it now because your emails were considered as spams by my company’s IT department …

 

It looks like I’ve been able to extract those controlled junctions, perfect.

 

I have another question. I’m interested in retrieving the state of the traffic lights associated to pedestrian crosswalks.

In the documentation, it says that the crosswalks’ states are at the end of “state” string when calling “getRedYellowGreenState()”.

Is there a way to know where do the pedestrian crosswalks start in that string ? Or is there a way to identify those crosswalks ?

 

Thank you,

Adrien

 

De : sumo-dev <sumo-dev-bounces@xxxxxxxxxxx> De la part de Jakob Erdmann
Envoyé : Monday, November 1, 2021 3:04 PM
À : sumo developer discussions <sumo-dev@xxxxxxxxxxx>
Objet : Re: [sumo-dev] Retrieving the type of Junction

 

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The junction type is currently not accessible via the TraCI API.  (for static network analysis, the python library sumolib is recommended: https://sumo.dlr.de/docs/Tools/Sumolib.html)

 

If you only need to identify traffic light junctions, you can use the functions in TrafficLight.h to retrieve this information:

- all traffic light controllers with getIDList

- all junction ids controller by a given controller with getControlledJunctions

 

regards,

Jakob

 

Am Mo., 1. Nov. 2021 um 18:16 Uhr schrieb Adrien Dubedat <adrien.dubedat@xxxxxxx>:

Hi,

 

I’m trying to retrieve the type of a Junction, I’m using the C++ library.

 

In an osm.net.xml file which lists all junctions, I see there are some different node types (https://sumo.dlr.de/docs/Networks/PlainXML.html#node_types) :

 

<junction id="101335548" type="traffic_light" x="9587.74" y="5049.51" incLanes="-770022998#1_0 480644124#1_0 690226256#9_0 -11661029#1_0" intLanes=":101335548_0_0 :101335548_1_0 :101335548_16_0 :101335548_17_0 :101335548_4_0 :101335548_5_0 :101335548_18_0 :101335548_19_0 :101335548_8_0 :101335548_9_0 :101335548_20_0 :101335548_21_0 :101335548_12_0 :101335548_13_0 :101335548_22_0 :101335548_23_0" shape="9587.30,5041.43 9593.31,5043.64 9592.97,5045.85 9593.23,5046.73 9593.79,5047.47 9594.63,5048.06 9595.77,5048.51 9593.99,5054.65 9591.44,5054.42 9590.39,5054.75 9589.50,5055.38 9588.76,5056.31 9588.18,5057.54 9582.17,5055.32 9582.52,5053.10 9582.26,5052.21 9581.71,5051.46 9580.87,5050.85 9579.74,5050.39 9581.63,5044.27 9584.11,5044.53 9585.13,5044.20 9586.00,5043.58 9586.72,5042.65">

 

I looked in the C++ classes / headers, mostly in “Junction” class, and I didn’t find anything related to that type, while we can get the Position or the Shape for example.

 

Does anyone have an idea on how to get this data ?

 

Thank you,

Adrien

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Attachment: controlled_crosswalks.json
Description: controlled_crosswalks.json

Attachment: controlled_crosswalks_links.json
Description: controlled_crosswalks_links.json


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