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!