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!