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!