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!