diff --git a/web_editor/assets/add.svg b/web_editor/assets/add.svg
new file mode 100644
index 0000000..7a4b6b8
--- /dev/null
+++ b/web_editor/assets/add.svg
@@ -0,0 +1,5 @@
+<svg width="24" height="24" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
+    <defs/>
+    <path fill="none" stroke="none" visibility="hidden" d="M 0 0 L 24 0 L 24 24 L 0 24 L 0 0 Z"/>
+    <path fill="#FFFFFF" stroke="none" d="M 12 2 C 6.48 2 2 6.48 2 12 C 2 17.52 6.48 22 12 22 C 17.52 22 22 17.52 22 12 C 22 6.48 17.52 2 12 2 Z M 17 13 L 13 13 L 13 17 L 11 17 L 11 13 L 7 13 L 7 11 L 11 11 L 11 7 L 13 7 L 13 11 L 17 11 L 17 13 Z"/>
+</svg>
diff --git a/web_editor/js/cards.js b/web_editor/js/cards.js
index 8eed57d..f416aad 100644
--- a/web_editor/js/cards.js
+++ b/web_editor/js/cards.js
@@ -11,7 +11,8 @@ export function makeLaneCard(lane, idx, app) {
   }
   node.appendChild(wrapInCenterDiv(width(lane)));
 
-  var finalRow = document.createElement("div");
+  var editRow = document.createElement("div");
+  editRow.align = "center";
 
   var left = iconObj("left");
   if (idx != 0) {
@@ -23,15 +24,14 @@ export function makeLaneCard(lane, idx, app) {
   } else {
     left.disabled = true;
   }
-  finalRow.appendChild(left);
-  finalRow.align = "center";
+  editRow.appendChild(left);
 
   var trash = iconObj("delete");
   trash.onclick = () => {
     app.road.lanes.splice(idx, 1);
     app.render();
   };
-  finalRow.appendChild(trash);
+  editRow.appendChild(trash);
 
   var right = iconObj("right");
   if (idx != app.road.lanes.length - 1) {
@@ -43,9 +43,23 @@ export function makeLaneCard(lane, idx, app) {
   } else {
     right.disabled = true;
   }
-  finalRow.appendChild(right);
+  editRow.appendChild(right);
 
-  node.append(finalRow);
+  node.append(editRow);
+
+  if (idx != app.road.lanes.length - 1) {
+    var add = iconObj("add");
+    add.className = "insert-lane";
+    add.onclick = () => {
+      app.road.lanes.splice(idx + 1, 0, {
+        type: "travel",
+        direction: "backward",
+        designated: "motor_vehicle",
+      });
+      app.render();
+    };
+    node.append(add);
+  }
 
   return node;
 }
diff --git a/web_editor/main.css b/web_editor/main.css
index 53a3ad5..c649773 100644
--- a/web_editor/main.css
+++ b/web_editor/main.css
@@ -6,6 +6,8 @@
 .card {
   outline: solid;
   padding: 15px;
+  /* So child elements can use position=absolute */
+  position: relative;
 }
 
 .card button {
@@ -33,6 +35,12 @@
   width: 50px;
 }
 
+.insert-lane {
+  position: absolute;
+  right: 0px;
+  bottom: 0px;
+}
+
 table,
 td {
   border: 1px solid black;