,,,,££,,,,                                          ,,££,,££,£
£,,,£,£,,,                                          £,£,£,£,££
,£,,££££,,                                          ,££££££££,
,££,£,,,£,                                          ££,,,,,,,£
££,£££,,££                                          ,,£,,,,,,£
,,££,,£,£,                   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!         £,,,,£,£,£
££,£££,,££                                          ££,,,£££££
,,££,,£,£,                                          ,,£,,£,,,,
,,£,£,££££                                          £,££,££,,,
,,£££££,,,                                          £££,££,£,,
,,£,,,,£,,                                          ,,,££,£££,
,,££,,,££,                                          ,,,£,££,,£