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!