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!