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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.            ##££*=*«~.
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.....«=£££ 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.                  #£=««.....
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.~«*=*££## 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. ##££*=*«~.
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.~«*=*£££#                 ££££££££                 #£££*=*«~.
......«=*£                                          £*=«......
.~«=*££### 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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