Canary yellow taxis are a common sight in Athens and are a reasonably priced way of getting around (if you can avoid the traffic jams).
The starting fee is €1, after which the meter ticks up at €0.34/km ("rate 1") or €0.64/km ("rate 2"), with a minimum fare of €2.65. Rate 1 applies through Athens city limits, including the airport, while rate 2 applies outside the city and from midnight to 5 AM. Legal surcharges apply for calling a cab by radio (€1.60), trips to or from the airport (€3.20) and heavy bags (€0.32). Tipping is not necessary, although it's common to round up to the nearest full Euro.
Taxi fare fraud is not as widespread as it used to be, but it still happens, so insist on the meter and make sure the rate is correct. At busy tourist locations cab drivers can try and con you with a set rate that is ridiculously high (fees of 20€ for a short trip). In these cases it is best to find another and again insist on the charge shown on the meter. If you feel you have been overcharged, ask for a receipt (they are obliged to give one) and take the plate number, then phone the tourist police to report the driver on 171.
Be aware that the taxi drivers rarely obey all of the rules of the road. Expect that if you are leaving Athens on an early flight, that the driver will likely drive aggressively to get you there as quickly as possible.
Taxis are considered as fairly cheap in Athens. As such you can expect to share the ride during rush hours if you can find one, and at night after the Metro has shutdown. As such if you hail a taxi which is already occupied (Free Taxis have a brightly lit TAXI sign on top of the cab) the driver will ask where you want to go to before he will let you in to join the other customers.
Strikes by cabbies and public transit are common so be prepared and watch the local news.
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