The Lisbon metro is cheap and fast for getting from the city centre to some of the suburbs and vice versa. The stations are clean and the trains are efficient. There are only four lines which are colour coded (green, blue, yellow and red) so it's easy to see which line you want. Each one is clearly signposted. A single journey costs 70 cents but it is much cheaper to buy a book of 10 tickets for 6.50 euros.
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