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!