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,,,,,,,,££ £££,,,,,££
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£,,££££,,, ,,££,,££££
,,,,££,,££ 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 ££££££££,,
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,,,,,££££, ££££££,,,,
££££,,££,, 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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£,,,,,,,,£ 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. ££££££££££
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