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!