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!