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!