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!