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!