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!