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!