Taxis in the UAE are ubiquitous, clean, and metered with strictly regulated fares. They can be hailed on the streets, as long as the taxi sign is lit green, which means the cab is not occupied. You can also book a taxi via relevant smart apps. In the larger emirates of Dubai, Abu Dhabi and Sharjah, taxis operate 24 hours a day. There are also special taxis for women passengers, driven by female chauffeurs, as well as airport taxis that transport passengers to and from the airports. If you are in Dubai, the Roads and Transport Authority also offers smart car rental service through which you can rent a car for not more than six hours. Uber services can also be availed.