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!