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!