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!