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!