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!