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!