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!