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!