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!