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!