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!