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!