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!