,,#,#,,,##                                          ##,##,#,##
,####,,#,,                                          ,##,####,#
#,,,#,##,#                                          #,##,,,###
#,,###,###                                          ##,#,,#,,,
#,#,,##,,,                                          ,###,##,,#
###,#,#,,#                  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!        #,,#,,##,#
,##,,,,,,#                                          #,##,#,###
#,#,,,,,#,                                          ##,####,,#
###,,,,###                                          ,##,,,#,#,
,,#,,,#,,#                                          #,#,,#####
,##,,##,##                                          ###,#,,,,#
#,#,#,##,,                                          ,,###,,,##