.&.&.&.... ...&.&.&&&
&&&&&&...& ..&&&&&..&
.....&..&& .&....&.&.
....&&.&.. &&...&&&&.
...&.&&&.. .&..&...&.
..&&&..&.. rails &&.&&..&&.
.&..&.&&.& .&&.&.&.&.
&&.&&&.&&. &.&&&&&&&.
.&&..&&.&. &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &&......&&
&.&.&.&&&& .&.....&.&
&&&&&&...& &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& &&....&&&.
.....&..&. .&...&..&&
....&&.&&& &&..&&.&.&
...&.&&..& trains are so constructed that they .&.&.&&&&&
..&&&.&.&& have to follow a set path. this path is &&&&&....&
.&..&&&&.& called a "railway", which is comprised ....&...&&
&&.&...&&. of two metal rails, hence its nickname. ...&&..&.&
.&&&..&.&. ..&.&.&&&.
&..&.&&&&. because the low friction between the .&&&&&..&.
&.&&&...&. wheels of the train and the rail metal, &....&.&&&
&&..&..&&& there are limits for how acute a curve &...&&&...
.&.&&.&..& can be, and even more so for how much &..&..&..&
&&&.&&&.&. the ground under the rails can be &.&&.&&.&&
..&&..&&&& sloped. thus a railway is often not led &&.&&.&&..
.&.&.&.... on top of hills, rather through them in .&&.&&.&..
&&&&&&.... tunnels (if they are large), or &.&&.&&&..
.....&...& artificial chasms. &&.&&..&.&
....&&..&& .&&.&.&&&&
...&.&.&.& there will be trees on the side of the &.&&&&...&
..&&&&&&&& rails, but not too close, or they will &&...&..&&
.&.......& be cut down by the railway janitors. .&..&&.&.&
&&......&& there will be plains, and bodies of &&.&.&&&&&
.&.....&.. water. .&&&&.....
&&....&&.& &...&.....
.&...&.&&& trains go by day and by night. along &..&&....&
&&..&&&... the way, there is information &.&.&...&&
.&.&..&... scattered, often put on top of poles, &&&&&..&..
&&&&.&&... to be interpreted by the train drivers. ....&.&&..
...&&.&..& different parts of the railway have ...&&&.&.&
..&.&&&.&. different speed limits. ..&..&&&&&
.&&&..&&&& .&&.&....&
&..&.&...& sometimes, trains have to stop and wait &.&&&...&&
&.&&&&..&& for something to happen, far away. this &&..&..&..
&&...&.&.& is signaled by red or green lights. .&.&&.&&.&
.&..&&&&&. &&&.&&.&&.
&&.&....&& &&&&&&&& ..&&.&&.&.
.&&&...&.. .&.&&.&&&&
&..&..&&.& many people follow the rails by foot. &&&.&&...&
&.&&.&.&&& often this proves to be the shorter ..&&.&..&.
&&.&&&&..& path between two points. however this .&.&&&.&&&
.&&...&.&. is frowned upon, and very impolite &&&..&&...
&.&..&&&&& toward the train drivers! ..&.&.&...
&&&.&....& .&&&&&&..&
..&&&...&& &.....&.&.
.&..&..&.. &....&&&&.
&&.&&.&&.. &...&...&.
.&&.&&.&.& &..&&..&&&
&.&&.&&&&. &.&.&.&..&