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