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!