#.#...#.#.                                          .###.##.##
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.#..#.#...                                          ..#.#.##.#
###.####..                                          ..#####.##
...##...#.                                          ..#....##.
...#.#..##                  rails                   ..##...#.#
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.#.#...###                                          .#####.#..
.####..#.. ######################################## ##....###.
.#...#.##.                                          #.#...#..#
###..###.# ######################################## ####..##.#
...#.#..##                                          #...#.#.##
#..####.#.                                          ##..#####.
##.#...### 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!         .#.#.#.#.#
.#####.#.#                                          ##########
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