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!