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!