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!