........@@ @....@....
@@@@@@@... ..@@...@@@
@@@@@@..@@ @....@..@@
@@@@@..... ..@@.....@
@@@@..@@@@ @....@@@..
.@@....@@. 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! @......@@@
......@@.. ..@@@@..@@
.@@@@..... @..@@.....
..@@..@@@@ ......@@@@
.......@@. @@@@@..@@.
@@@@@@.... @@@@......
.@@@@..@@@ @@@..@@@@.