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!