#¨#¨#####¨                                          ¨##¨¨#¨##¨
####¨¨¨¨##                                          #¨#¨###¨##
¨¨¨#¨¨¨#¨¨                                          ####¨¨##¨¨
¨¨##¨¨##¨#                                          ¨¨¨#¨#¨#¨¨
¨#¨#¨#¨##¨                                          ¨¨######¨¨
#######¨#¨                   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!        ##¨##¨#¨#¨
¨##¨###¨#¨                                          ¨##¨######
#¨##¨¨####                                          #¨##¨¨¨¨¨#
##¨#¨#¨¨¨#                                          ##¨#¨¨¨¨#¨
¨#####¨¨#¨                                          ¨###¨¨¨###
#¨¨¨¨#¨##¨                                          #¨¨#¨¨#¨¨#
#¨¨¨###¨#¨                                          #¨##¨##¨#¨