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!