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Route ignores obvious left turn

Scheduled Pinned Locked Moved [Web] Problems, Bugs and other Issues
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  • twinfanundefined twinfan

    Answered this last question by creating an OSM account and posting a note at that location.

    Martin Wilckeundefined Offline
    Martin Wilckeundefined Offline
    Martin Wilcke
    wrote on last edited by
    #7

    @twinfan said in Route ignores obvious left turn:

    posting a note at that location.

    What exactly do you mean by that?

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    0
    • twinfanundefined Offline
      twinfanundefined Offline
      twinfan
      wrote on last edited by
      #8

      OSM provides for problem reporting and map fixes. I made this note:

      alt text

      Martin Wilckeundefined 1 Reply Last reply
      0
      • twinfanundefined twinfan

        OSM provides for problem reporting and map fixes. I made this note:

        alt text

        Martin Wilckeundefined Offline
        Martin Wilckeundefined Offline
        Martin Wilcke
        wrote on last edited by
        #9

        @twinfan said in Route ignores obvious left turn:

        OSM provides for problem reporting and map fixes.

        I know. But what exactly causes the problem, in your opinion, and what should be changed or corrected?
        As mentioned above, other planners based on OSM allow a left turn, so it's not an OSM Map issue. Do you disagree?

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        • twinfanundefined Offline
          twinfanundefined Offline
          twinfan
          wrote on last edited by
          #10

          @Martin-Wilcke said in Route ignores obvious left turn:

          I know. But what exactly causes the problem, in your opinion, and what should be changed or corrected?
          As mentioned above, other planners based on OSM allow a left turn, so it's not an OSM Map issue. Do you disagree?

          From what I read in the earlier posts the HERE and TomTom maps route correctly when selected. So does the Garmin City Navigator North America NT 2025.2 map on my Zumo XT. I think it is a problem with the OSM map but I have no idea how one would fix it.

          Martin Wilckeundefined 1 Reply Last reply
          0
          • twinfanundefined twinfan

            @Martin-Wilcke said in Route ignores obvious left turn:

            I know. But what exactly causes the problem, in your opinion, and what should be changed or corrected?
            As mentioned above, other planners based on OSM allow a left turn, so it's not an OSM Map issue. Do you disagree?

            From what I read in the earlier posts the HERE and TomTom maps route correctly when selected. So does the Garmin City Navigator North America NT 2025.2 map on my Zumo XT. I think it is a problem with the OSM map but I have no idea how one would fix it.

            Martin Wilckeundefined Offline
            Martin Wilckeundefined Offline
            Martin Wilcke
            wrote on last edited by
            #11

            @twinfan said in Route ignores obvious left turn:

            I think it is a problem with the OSM map but I have no idea how one would fix it.

            I have taken a closer look at this spot.

            The issue is probably caused by an extra barrier:lift_gate entry in addition to the railway:level_crossing. In my opinion, this is wrong.

            I've added this to your comment, let's see if a mapper with local knowledge makes a change there.

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            • twinfanundefined Offline
              twinfanundefined Offline
              twinfan
              wrote on last edited by
              #12

              Thank you, @Martin-Wilcke . I was contemplating learning more about OSM editing but it is very complex and I wouldn't want to make things worse.

              Martin Wilckeundefined 1 Reply Last reply
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              • twinfanundefined Offline
                twinfanundefined Offline
                twinfan
                wrote on last edited by
                #13

                I also thought it odd that there were signals shown in only three of the four corners but, then again, I don't understand the mapping "language."

                ![alt text](e15f6f5e-9fe8-4731-a067-62de0d06c9ae-image.png image url)

                Martin Wilckeundefined 1 Reply Last reply
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                • twinfanundefined twinfan

                  I also thought it odd that there were signals shown in only three of the four corners but, then again, I don't understand the mapping "language."

                  ![alt text](e15f6f5e-9fe8-4731-a067-62de0d06c9ae-image.png image url)

                  Martin Wilckeundefined Offline
                  Martin Wilckeundefined Offline
                  Martin Wilcke
                  wrote on last edited by Martin Wilcke
                  #14

                  @twinfan said in Route ignores obvious left turn:

                  I don't understand the mapping "language."

                  Here is an overview of all valid keys, their values, meaning and examples:

                  https://wiki.openstreetmap.org/wiki/Map_features

                  Search for railway:level_crossing and barrier:lift_gate; these are the key types related to this issue.

                  It is worth familiarising yourself with the different categories because there is an extra bonus: you can search for OSM POIs in a given area, export them as GPX and import them into MRA. This way, you can create your own POI libraries in MRA. We have discussed an example ("castles in the UK") here:

                  https://forum.myrouteapp.com/post/58690

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                  • twinfanundefined twinfan

                    Thank you, @Martin-Wilcke . I was contemplating learning more about OSM editing but it is very complex and I wouldn't want to make things worse.

                    Martin Wilckeundefined Offline
                    Martin Wilckeundefined Offline
                    Martin Wilcke
                    wrote on last edited by Martin Wilcke
                    #15

                    @twinfan

                    According to Google Street View, there is a railway crossing with two half barrier arms but no extra lift gate (this is the mapping error):

                    OSM-3.jpg

                    So, I recommend making the following changes (for both directions):

                    • Delete the lift gate barrier:

                    OSM-4.jpg

                    Add the "two-half barrier arm" attribute to the railway crossing:

                    OSM-5.jpg

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                    • twinfanundefined Offline
                      twinfanundefined Offline
                      twinfan
                      wrote on last edited by
                      #16

                      Thank you, @Martin-Wilcke, I will give it a try. I use that intersection regularly, today in fact.

                      Martin Wilckeundefined 1 Reply Last reply
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                      • twinfanundefined Offline
                        twinfanundefined Offline
                        twinfan
                        wrote on last edited by
                        #17

                        I made your recommended changes and checked the box asking for a review from an experience mapper, just in case. I also found another intersection about one mile earlier in the route that had a similar condition and revised it. This explains how MRA chose the route it did on my initial try. Thank you again for your guidance. I enjoyed learning about OSM!
                        Tom

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                        • twinfanundefined twinfan

                          Thank you, @Martin-Wilcke, I will give it a try. I use that intersection regularly, today in fact.

                          Martin Wilckeundefined Offline
                          Martin Wilckeundefined Offline
                          Martin Wilcke
                          wrote on last edited by
                          #18

                          @twinfan

                          https://www.openstreetmap.org/note/4613925

                          Cool! 👍

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