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!