diff --git a/examples/flatland_2_0_example.py b/examples/flatland_2_0_example.py
index 6396f4123adf895c381c2a21f6d8dc6e4e823b92..57e99ffb89e9f6584fff9707de921c5fda101585 100644
--- a/examples/flatland_2_0_example.py
+++ b/examples/flatland_2_0_example.py
@@ -32,8 +32,8 @@ speed_ration_map = {1.: 0.25,  # Fast passenger train
 
 env = RailEnv(width=50,
               height=50,
-              rail_generator=sparse_rail_generator(num_cities=10,  # Number of cities in map (where train stations are)
-                                                   seed=1,  # Random seed
+              rail_generator=sparse_rail_generator(num_cities=50,  # Number of cities in map (where train stations are)
+                                                   seed=0,  # Random seed
                                                    grid_mode=False,
                                                    max_inter_city_rails=2,
                                                    max_tracks_in_city=4,
diff --git a/flatland/envs/rail_generators.py b/flatland/envs/rail_generators.py
index 6cfbece9a3203772e05ddb08dff51575f4f012d4..fcd5e672776551b9eb066db145161b80c532c36f 100644
--- a/flatland/envs/rail_generators.py
+++ b/flatland/envs/rail_generators.py
@@ -632,7 +632,7 @@ def sparse_rail_generator(num_cities=5, grid_mode=False, max_inter_city_rails=4,
                 to_close = False
                 # Check distance to nodes
                 for node_pos in node_positions:
-                    if _city_overlap((x_tmp, y_tmp), node_pos, 2 * node_radius + 2):
+                    if _city_overlap((x_tmp, y_tmp), node_pos, 2 * (node_radius + 1) + 1):
                         to_close = True
 
                 if not to_close: