Taxis can be the most efficient and comfortable mode of transportation in Mexico City.  Driving is not recommended here if you are not familiar with the city and especially if you cannot at least read Spanish, in which all street signs are written. The good thing about driving is the freedom and that you will not wait for a taxi, also expect to pay at the most 5 USD for valet parking; normal parking can cost you 1 to 4 USD. It is important not to park your car in a no parking zone, as you may not find your car.   There are several types of taxis in the city.  Tourist taxis, which can be found at the airport, have fixed prices for set destinations such as hotels.  The Taxis de Sitio, or fixed taxis, can be reached by phone or at taxi stands.  These are monitored and charge slightly less than the tourist taxis do. 

A free service called  Taxiaviso   allows anyone to imlement the two most recomended security tips when riding a cab in Mexico City: (1) to make sure that it is an official cab, and (2) to notify a person you trust about the taxi license plate number. The Taxiaviso app, which is available for iPhone, Android and Blackberry, checks the license plate of the cab in a database of offcial taxis provided by the government, and confirms if the cab is official. Additionally it can post in your facebook, twitter or email accounts the moment you take a cab together with the license plate and location.

In recent years, government has carried out considerable efforts to diminish the number of "pirate" taxis. Taxi drivers are now obliged and controlled to have a license with a picture on the right window, to have a taxi number plate  starting with A or B, and to have the taxi meter running. At night, they should have a light inside the cab. If you decide to flag a taxi on the street and one of these conditions is not fulfilled, say "No gracias", and look for another one.

Radio Taxis

The following is contact information for "radio taxi" service in Mexico City - considered amongst the most secure of public transportation.  This type of taxi service will cost more than if you flag a taxi on the street, but it's a recommended service because of the increased risk of being victimized when riding in a "random" taxi flagged on the street. 

Taxi-Mex:  Tel.  5519-7690. 

Servi-Taxi's:  Tel.  5271-2560

Radio-Elite:  Tel.  5560-1122

Radio-Taxi:  Tel.  5566-0077

Porto-Taxi:   Tel. 49933232

 You can also use the Taxiaviso app to get a listing and phone number of the official Radio Taxis site that are closest to your current location.

Uber

Uber has become a popular choice for local transportation in Mexico City, just as it has elsewhere.