Metro: Tehran has an extensive metro network of eight lines covering most of the city from the airport in the south to the northern suburbs. It is fast, cheap, and well-organised. Women must use designated carriages on some lines. The metro is the recommended way to get between the main sights — it avoids Tehran's legendarily bad traffic.
Taxis: Widely available and cheap by international standards. Shared taxis (savari) operate on fixed routes; private taxis are negotiated. Snapp is Iran's equivalent of Uber, available for smartphones, and is how most Tehranis now get around. It is significantly cheaper and easier than flagging down a taxi.
Bus: The BRT (Bus Rapid Transit) network supplements the metro and is useful for routes the metro does not cover. Tickets are inexpensive.
Walking: In the central and northern districts, walking between sights is practical for anyone who can tolerate the noise and pollution. The bazaar area, the museum district, and the area around Laleh Park can all be covered on foot. In high summer, the heat makes this unpleasant.
Driving is not recommended for visitors — Tehran's traffic is some of the worst in the world and the road culture is intense.