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!