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!