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!