diff --git a/openttd-srnw.org b/openttd-srnw.org
index c2df722..fb884ea 100644
--- a/openttd-srnw.org
+++ b/openttd-srnw.org
@@ -7,6 +7,7 @@ Every other year or so I decide to play a game or ten of
 out in the past so I have to start from first principles.
 In this case, first principles means reading the [[https://wiki.openttdcoop.org/Main_Page][openttdcoop Wiki]]
 [fn::which is quite dense] and watching a bunch of [[https://www.youtube.com/@LugnutsK][LugnutsK]] videos.
+
 * Self Regulating Passenger Network
 The idea of a self regulating passenger network is to grow a city and
 transport as many passengers out of the city as possible with the
@@ -44,8 +45,19 @@ only accessible when there is a full load of passengers available.
 
 * City Layout
 For maximum growth and ease of putting train stations into the city we
-are using a 3x3 road grid. A spiral would be even better but it is
-annoying to put train stations into a spiral without disrupting the
-roads too much and creating dead-ends. Dead-ends are very bad for town
-growth.
+are using a 3x3 road grid. A spiral would be even better for city
+growth but it is annoying to put train stations into a spiral without
+disrupting the roads too much and creating dead-ends. Dead-ends are
+very bad for town growth.
+
+We need to find a balance between station size[fn:One constraint here
+is how much the station takes away from the city to build houses.],
+city coverage, and needed capacity at the transfer station. Using spread
+stations covering a 5x5 block[fn: A block is a 3x3 road grid.] and
+having six of those works fairly well. To be able to fit tunnels in we
+put two in a line and have three lines. Three in a line would also
+leave enough space for tunnels. This results in a city grid of 13x8
+blocks.
+
+[[file:openttd-srnw/city-layout.png][file:openttd-srnw/city-layout_small.png]]
 
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