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!