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!