diff --git a/src/renderer/components/ArcEdit.vue b/src/renderer/components/ArcEdit.vue
index 4ff58a3..2d718ec 100644
--- a/src/renderer/components/ArcEdit.vue
+++ b/src/renderer/components/ArcEdit.vue
@@ -27,6 +27,21 @@
             <el-switch v-model="isPushback"></el-switch>
           </el-col>
         </el-row>
+        <el-row>
+          <el-col :span="7">
+            <span class="demo-input-label">Direction :</span>
+          </el-col>
+          <el-col :span="15">
+            <el-select v-model="direction" placeholder="Select">
+              <el-option
+                v-for="type in options"
+                :key="type.value"
+                :label="type.label"
+                :value="type.value"
+              ></el-option>
+            </el-select>
+          </el-col>
+        </el-row>
     </div>
 </template>
 
@@ -36,6 +51,14 @@
       arc: function () {
         return this.$store.state.Editable.type === 'arc'
       },
+      // ga (general aviation), cargo (cargo), gate (commercial passenger traffic),
+      // mil-fighter (military fighter), mil-cargo (military transport)
+      options: function () {
+        return [{value: 'bi-directional', label: 'bi-directional'},
+          {value: 'forward', label: 'forward'},
+          {value: 'backward', label: 'backward'}
+        ]
+      },
       name: {
       // getter
         get: function () {
@@ -55,6 +78,16 @@
         set: function (newValue) {
           this.$store.commit('SET_EDIT_PUSHBACK', newValue ? '1' : '0')
         }
+      },
+      direction: {
+      // getter
+        get: function () {
+          return this.$store.state.Editable.data.arc.direction
+        },
+        // setter
+        set: function (newValue) {
+          this.$store.commit('SET_EDIT_DIRECTION', newValue)
+        }
       }
     }
   }
diff --git a/src/renderer/loaders/TaxiwaySegmentExtender.js b/src/renderer/loaders/TaxiwaySegmentExtender.js
index ee05d77..4b18959 100644
--- a/src/renderer/loaders/TaxiwaySegmentExtender.js
+++ b/src/renderer/loaders/TaxiwaySegmentExtender.js
@@ -107,6 +107,9 @@ exports.extendTaxiSegment = function (taxiwaySegment) {
         });
         this.on('editable:vertex:clicked', function (event) {
             console.log(this.featureLookup[event.vertex.glueindex]);            
+            if (this.edit) {
+                
+            }
 
             store.default.dispatch('setNode', event.vertex.latlng.attributes)
             if(event.vertex._icon!=null) {
@@ -235,10 +238,14 @@ exports.extendTaxiSegment = function (taxiwaySegment) {
           style.color = '#3388ff';  
         }
         this.setStyle(style);
-        if (!this.bidirectional) {
-            this.setText('  ►  ', {repeat: true, attributes: {fill: 'red', size: 20}})
-        } else {
-            this.setText('')
+        if (this.options.attributes.direction === 'forward') {
+            this.setText(null);
+            this.setText('  ⮞  ', {repeat: true, attributes: {fill: 'red', size: 30}})
+        } else if (this.options.attributes.direction === 'backward') {
+            this.setText(null);
+            this.setText('  ⮜  ', {repeat: true, attributes: {fill: 'red', size: 30}})
+        }else {
+            this.setText(null);
         }        
     };
 };
diff --git a/src/renderer/loaders/groundnet_loader.js b/src/renderer/loaders/groundnet_loader.js
index f437814..f3fa8e4 100644
--- a/src/renderer/loaders/groundnet_loader.js
+++ b/src/renderer/loaders/groundnet_loader.js
@@ -53,6 +53,8 @@ exports.readGroundnetXML = function (fDir, icao, force) {
             var merged = new Array();
 
             var nodesLookup = {};
+            featureLookup = [];
+
 
             parkingNodes.map(n => {
                 var circle = parkingSpot(n, layerGroup);
@@ -102,6 +104,7 @@ exports.readGroundnetXML = function (fDir, icao, force) {
                         featureLookup[n.attr('begin')].forEach(element => {
                             if (element instanceof L.Polyline && element.end === n.attr('begin') && element.begin === n.attr('end')) {
                                 element.bidirectional = true;
+                                element.options.attributes.direction = 'bi-directional'
                                 bidirectional = true;
                                 element.updateStyle();
                             }
@@ -111,7 +114,8 @@ exports.readGroundnetXML = function (fDir, icao, force) {
                         featureLookup[n.attr('end')].forEach(element => {
                             if (element instanceof L.Polyline && element.end === n.attr('begin') && element.begin === n.attr('end')) {
                                 element.bidirectional = true;
-                                bidirectional = true;
+                                element.options.attributes.direction = 'bi-directional'
+                                bidirectional = true;                                
                                 element.updateStyle();
                             }
                         });
@@ -148,6 +152,7 @@ exports.readGroundnetXML = function (fDir, icao, force) {
                             else
                                 polyline.options.attributes[key] = Number(value);
                         });
+                        polyline.options.attributes.direction = 'forward'
                         polyline.updateStyle();
 
                         polyline.begin = beginNode.attr('index');
diff --git a/src/renderer/loaders/groundnet_writer.js b/src/renderer/loaders/groundnet_writer.js
index cd36edc..d9f3cc2 100644
--- a/src/renderer/loaders/groundnet_writer.js
+++ b/src/renderer/loaders/groundnet_writer.js
@@ -55,14 +55,18 @@ exports.writeGroundnetXML = function (fDir, icao, featureList) {
                         if (featureLookup[latlng.__vertex.glueindex] == undefined) {
                             featureLookup[latlng.__vertex.glueindex] = [];
                         }
-                        arc = { '@begin': startIndex, '@end': String(latlng.__vertex.glueindex) };
-                        styleArc(currentArc, arc);
-                        arcList.push(arc);
-                        featureLookup[startIndex][latlng.__vertex.glueindex] = arc;
-                        arc = { '@begin': String(latlng.__vertex.glueindex), '@end': startIndex };
-                        styleArc(currentArc, arc);
-                        arcList.push(arc);
-                        featureLookup[latlng.__vertex.glueindex][startIndex] = arc;
+                        if( currentArc.direction === 'bi-directional' || currentArc.direction === 'forward' ){
+                            arc = { '@begin': startIndex, '@end': String(latlng.__vertex.glueindex) };
+                            styleArc(currentArc, arc);
+                            arcList.push(arc);
+                            featureLookup[startIndex][latlng.__vertex.glueindex] = arc;    
+                        }
+                        if( currentArc.direction === 'bi-directional' || currentArc.direction === 'backward' ){
+                            arc = { '@begin': String(latlng.__vertex.glueindex), '@end': startIndex };
+                            styleArc(currentArc, arc);
+                            arcList.push(arc);
+                            featureLookup[latlng.__vertex.glueindex][startIndex] = arc;
+                        }
                     }
                     startIndex = latlng.__vertex.glueindex;
                 }
diff --git a/src/renderer/store/modules/Editable.js b/src/renderer/store/modules/Editable.js
index 220edad..cdd7fb4 100644
--- a/src/renderer/store/modules/Editable.js
+++ b/src/renderer/store/modules/Editable.js
@@ -63,6 +63,9 @@ const mutations = {
   'SET_EDIT_PUSHBACK' (state, isPushBackRoute) {
     Vue.set(state.data.arc, 'isPushBackRoute', isPushBackRoute)
   },
+  'SET_EDIT_DIRECTION' (state, direction) {
+    Vue.set(state.data.arc, 'direction', direction)
+  },
   'SET_EDIT_HOLDPOINTTYPE' (state, holdPointType) {
     Vue.set(state.data.node, 'holdPointType', holdPointType)
   },