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!