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!