From 744f1199eca02b1a1a4166e4d2750c42b0f03239 Mon Sep 17 00:00:00 2001
From: Michael Behrisch <michael.behrisch@dlr.de>
Date: Fri, 1 Dec 2023 16:53:22 +0100
Subject: [PATCH] ensuring walkability with foot="yes" fix #14124

---
 src/netimport/NIImporter_OpenStreetMap.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/netimport/NIImporter_OpenStreetMap.cpp b/src/netimport/NIImporter_OpenStreetMap.cpp
index 8cdf48195979..6f54db37c18f 100644
--- a/src/netimport/NIImporter_OpenStreetMap.cpp
+++ b/src/netimport/NIImporter_OpenStreetMap.cpp
@@ -743,6 +743,11 @@ NIImporter_OpenStreetMap::insertEdge(Edge* e, int index, NBNode* from, NBNode* t
                     || (myImportSidewalks && (sidewalkType & WAY_FORWARD) != 0 && defaultPermissions != SVC_PEDESTRIAN)) {
                 nbe->addSidewalk(sidewalkWidth * offsetFactor);
             }
+            if (!addBackward && (e->myExtraAllowed & SVC_PEDESTRIAN) != 0 && (nbe->getPermissions(0) & SVC_PEDESTRIAN) == 0) {
+                // pedestrians are explicitly allowed (maybe through foot="yes") but dídn't get a sidewalk (maybe through sidewalk="no")
+                // since we do not have a backward edge, we need to make sure they can at least walk somewhere, see #14124
+                nbe->setPermissions(nbe->getPermissions(0) | SVC_PEDESTRIAN, 0);
+            }
             nbe->updateParameters(e->getParametersMap());
             nbe->setDistance(distanceStart);