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!