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!