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Route ignores obvious left turn

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

      1 Reply Last reply
      0
      • 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
            0
            • 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
                    0
                    • 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

                      1 Reply Last reply
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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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