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!