diff --git a/_example/default_subnet/example.tf b/_example/default_subnet/example.tf
index 7c51729..99cae99 100644
--- a/_example/default_subnet/example.tf
+++ b/_example/default_subnet/example.tf
@@ -49,3 +49,29 @@ module "subnet" {
     }
   ]
 }
+
+module "subnet_2" {
+  source = "../.."
+
+  name        = "app"
+  environment = "test"
+
+  resource_group_name  = module.resource_group.resource_group_name
+  location             = module.resource_group.resource_group_location
+  virtual_network_name = join("", module.vnet.vnet_name)
+
+  #subnet
+  subnet_names    = ["sub3", "sub4"]
+  subnet_prefixes = ["10.0.3.0/24", "10.0.4.0/24"]
+
+  # route_table
+  enable_route_table = true
+  route_table_name   = "test_rt"
+  routes = [
+    {
+      name           = "rt-test"
+      address_prefix = "0.0.0.0/0"
+      next_hop_type  = "Internet"
+    }
+  ]
+}
diff --git a/_example/name-specific_subnet/example.tf b/_example/name-specific_subnet/example.tf
index 8b57ebf..9a53335 100644
--- a/_example/name-specific_subnet/example.tf
+++ b/_example/name-specific_subnet/example.tf
@@ -40,7 +40,8 @@ module "name_specific_subnet" {
   subnet_prefixes       = ["10.0.1.0/24"]
 
   # route_table
-  route_table_name = "name_specific_subnet"
+  enable_route_table = true
+  route_table_name   = "name_specific_subnet"
   routes = [
     {
       name           = "rt-test"
diff --git a/_example/nat-gateway_subnet/example.tf b/_example/nat-gateway_subnet/example.tf
index a8d2559..24fd48e 100644
--- a/_example/nat-gateway_subnet/example.tf
+++ b/_example/nat-gateway_subnet/example.tf
@@ -40,7 +40,8 @@ module "subnet" {
   subnet_prefixes    = ["10.0.1.0/24", "10.0.2.0/24"]
 
   # route_table
-  route_table_name = "nat_gateway"
+  enable_route_table = true
+  route_table_name   = "nat_gateway"
   routes = [
     {
       name           = "rt-test"
diff --git a/main.tf b/main.tf
index 44b7a79..281388f 100644
--- a/main.tf
+++ b/main.tf
@@ -105,7 +105,7 @@ resource "azurerm_subnet_nat_gateway_association" "subnet_assoc" {
 #Route Table
 resource "azurerm_route_table" "rt" {
   count               = var.enable && var.enable_route_table ? 1 : 0
-  name                = format("%s-%s-route-table", module.labels.id, var.route_table_name)
+  name                = var.route_table_name == null ? format("%s-route-table", module.labels.id) : format("%s-%s-route-table", module.labels.id, var.route_table_name)
   location            = var.location
   resource_group_name = var.resource_group_name
   dynamic "route" {
diff --git a/variable.tf b/variable.tf
index 693c11c..0b5daa5 100644
--- a/variable.tf
+++ b/variable.tf
@@ -167,7 +167,7 @@ variable "routes" {
 
 variable "route_table_name" {
   type        = string
-  default     = ""
+  default     = null
   description = "The name of the route table."
 }