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!