Yes, cabs in Tangier usually have a taximeter. However, not all drivers use them, so it is advisable to agree on a fare before starting the journey. If you prefer the meter, you should strongly urge the driver to turn it on. Generally, smaller "petit cabs" are used for shorter trips within the city, while larger "grand cabs" are for longer trips outside the city center. In any case, cab rides in Tangier are inexpensive.