#¨###¨###¨                                          ###¨###¨¨#
#¨#¨#¨#¨##                                          #¨#¨#¨##¨#
#¨¨¨¨¨¨¨##                                          ¨¨¨¨¨¨##¨#
##¨¨¨¨¨¨#¨                                          ¨¨¨¨¨¨##¨#
¨##¨¨¨¨¨¨¨                                          ¨¨¨¨¨¨##¨#
¨###¨¨¨¨¨¨                  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. ¨¨¨¨###¨¨¨
¨¨#¨##¨¨¨¨                                          #¨¨¨#¨##¨¨
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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!        ¨¨¨¨#¨##¨¨
¨¨#¨##¨¨¨¨                                          ¨¨¨¨¨¨###¨
¨¨¨¨###¨¨¨                                          ¨¨¨¨¨¨#¨##
#¨¨¨#¨##¨¨                                          #¨¨¨¨¨¨¨##
##¨¨¨¨###¨                                          ##¨¨¨¨¨¨#¨
###¨¨¨#¨##                                          ¨##¨¨¨¨¨¨¨
#¨##¨¨¨¨##                                          ¨###¨¨¨¨¨¨