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!