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!