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,,,£££,,,£                                          ££,,,,£,££
£,,£,££,,, 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.                  ,££,,,,,£,
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£,,,,,,£,, 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. ,,£,,£,,,,
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,,,£££,,,,                 ££££££££                 ££,,£,,£,,
,,,£,££,,,                                          ,££,,£,,£,
,,,,,£££,, 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!        ,,,,,£££,,
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