Its main advantage is the cost (each way usually does not exceed 10,000 Riyals) and on the other hand is ideal to know those parts of Tehran where the population moves every day. The "Taxi" accumulates in these hot spots, and people constantly coming in and out of them. They are usually green or yellow, but can also has a regular look like. Another way to recognize them is because the taxi drivers use their horns (or their car lights) to attract your attention just to indicate they have a free seat and can pick you up.
