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!