Update grid.json

grid.json

@@ -152,13 +152,27 @@
             "size": 2,
             "color": "Dark Green",
             "sensors": ["Environmental sensors", "Smart irrigation systems", "Adaptive lighting systems"]
+        },
+        {
+            "coords": [0, 0],
+            "type": "Typical Road",
+            "size": 1,
+            "color": "Dark Grey",
+            "sensors": ["Traffic flow sensors", "Smart streetlights", "Pollution monitoring sensors"]
+        },
+        {
+            "coords": [0, 0],
+            "type": "Typical Road Crossing",
+            "size": 1,
+            "color": "Dark Grey",
+            "sensors": ["Traffic flow sensors", "Smart streetlights", "Pollution monitoring sensors"]
         }
     ],
     "roads": [
         {
             "start": [0, 0],
             "end": [20, 0],
-            "color": "#AA0000",
+            "color": "#898989",
             "sensors": ["Traffic flow sensors", "Smart streetlights", "Pollution monitoring sensors"]
         },
         {