OVERVIEW:

Naples has an extensive public transit network, one of the biggest in Italy, serving more than 4 millions of inhabitants in the metropolitan area.

Naples urban transportation system consists, at present, of 3 metro lines (line 1, 2 and 6), a dozen of urban commuter railways, 4 funiculars, 3 tram lines, 3 urban trolleybus lines, about 80 urban bus lines, 3 suburban trolleybus lines, and a quantity of suburban and regional bus lines. 

The main hub for railways (national, regional and local lines)  and metros (lines 1 & 2) is the Stazione Centrale (central station), located in piazza Garibaldi.

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MAPS:

There are several comprehensive transit maps in internet. You can find an almost updated map of the Naples metro and railways network here: http://www.napo...

Here is another useful map, showing metro lines (line 1 in yellow, line 2 in blue), funiculars (green) and tram lines (red): http://www.urbanrail.net/eu/it/nap/tr...

UnicoCampania site is where you will find the most updated PDF maps for their various bus, trolley, tram, metro and train services. There are two maps for Naples - including one with suggested ways for getting between key points around the city. To download them, start from the new 'Maps' link on the first of their English pages, here: http://www.unicocampania.it/index.php...

You can also ask for maps at the tourist offices in Capodichino airport arrivals terminal, Napoli Centrale/Garibaldi train station, Galleria Umberto (near the San Carlo Opera House) or in Piazza Plebiscito. There's also an online bus map for Naples (not updated)..

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SMARTPHONE MAPS and APPS:

If you own a smartphone, you can see all the Naples network. including metro, trams, funiculars and bus lines with stops (and timetables) with googlemaps+.

You should also download one or both of these very useful apps on your smarthphone: Gira Napoli and Moovit. They both show in realtime the departures at the stops of every lines of the Naples public transport network (buses, metros, trams, funiculars). Gira Napoli also shows other useful tourist informations, while Moovit makes your phone work as a complete public transit navigation device, using the gps position.

Download Giranapoli for android here: https://play.google.com/store/apps/de...

Download Giranapoli for Iphone here: https://itunes.apple.com/it/app/gira-...

Download Moovit here: http://moovitapp.com/

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TICKETS:

Warning, as of 1st January 2015, the ticketing system for public transport in Naples has completely changed. 

The ticketing agency for Naples and the Campania region is the Unico Campania consortium.

Unico Napoli tickets are now called TIC tickets and are required for travel within the City of Naples (Comune di Napoli).  TIC tickets are valid on: all city (ANM) buses; the four funicular lines; regional EAV buses, Metro Lines 1, 2 and 6, and the Circumvesuviana, Circumflegrea and Cumana commuter lines within the confines of the city.

Basic TIC Tickets are valid for 90 minutes and cost €.1,50. There are also daily (€.4,50), weekly (€15.80), monthly (€.42,00) and annual (€294.00) tickets.

There are also cheaper ANM and EAV tickets, (starting from €.1,00), that covers only one journey using only one line without interchanges.   

Tickets can be purchased at Tabacchi (tobacco shops), newsstands and ticket machines in stations. You must always validate your ticket as you enter the bus or the train station when using it for the first time. Having a ticket that has not been validated is the same as not having a ticket at all. Yellow validation machines are not always obvious - you may have to look for them. Inspectors regularly stake out the connections between stations to make sure that travelers have valid tickets. Having an unvalidated ticket will get you a spot fine of 37-100 euro.

Unico Alibus tickets are required for travel via Naples Alibus (to and from Capodichino Airport).  Tickets are €3.00 at an authorised agent, €4.00 if purchased on board the bus.  Tickets are valid for 90 minutes from the time of validation.  They CANNOT be used for a round trip on the Alibus but can be used on a combination trip (Alibus followed by any other mode of transport that normally would be valid with a TIC ticket, or vice versa).

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HUBS:

Useful transit hubs are Piazza Garibaldi for trains, metros and buses, Piazza Municipio/Porto for ships, trams, metros and buses and Aeroporto di Capodichino, the main airport for Naples, for planes and buses (Sorrento, Salerno). Most bus, tram and trolley lines go to the main Garibaldi/Napoli Centrale railroad station, and many go past P.za Municipio (Castel Nuovo, Royal Palace , Opera House).  Please be careful as there could be pick pockets on the most crowded buses and stations platforms and the hustle and bustle is an easy distraction so take care and be aware.

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USEFUL LINES:

Useful bus and tram routes include:

R2 (bus) from Garibaldi train station to Piazza Municipio and Piazza Plebiscito through Corso Umberto (Headway of 8-12 minutes, but this bus line is often crowded).

Tram line 1 (less crowded and speedier than rhe R2 bus ) from Piazza Municipio (near Hydrofoils and Cruise ships Terminal) to Piazza Garibaldi (Central Station) and Centro Direzionale (the bigger skyline in Italy) through Via Marittima and Corso Garibaldi. Trams headway is ten minutes and travel time is about 10 minutes to Piazza Garibaldi, 20 minutes to Centro Direzionale.

2M (bus) from Museo Archeologico Nazionale to Museo di Capodimonte.

R4 (bus) from Piazza Municipio to Museo di Capodimonte, through Piazza Dante and Museo Archeologico Nazionale.

140 (bus) from Piazza Municipio to Cape Posillipo trough Chiaia and Mergellina.

The Alibus is a special bus running a circular route with only 3 stops: Capodichino airport, Garibaldi train station, and Piazza Municipio across from Molo Beverello port. You can buy tickets onboard for 4 euro, or in a Tobacconist or Newsstand for 3 euro, and validate it in the machine. Many suburban bus lines also leave from in front of the train station, or from a terminal a few blocks south of the Maritime Station along the waterfront.  These can take you to Amalfi, for example. The Circumvesuviana trains to Pompeii and Sorrento leave from the main station, but in a separate downstairs area.

The Naples Metro is currently being extended to better serve the historic area and to reach the airport, but this huge project involves lots of archeology, and will take years to complete. At present, two metro lines depart from Piazza Garibaldi (under the Central Station). The line 1 (trains every 8 minutes) goes to University, Municipio, Toledo, Piazza Dante, the National Archeological Museum, and then up the Vomero Hill, while the line 2 (trains every 12 minutes) goes from Garibaldi train station westward to Pozzuoli, through Piazza Cavour, Montesanto, Mergellina and Fuorigrotta (San Paolo Stadium).

Because Naples is an hilly town, another useful transport option are the funicular lines, there are three lines running from historic center to the Vomero Hill, and one line running from Mergellina to Posillipo hill. A funicular (also called incline railway) is basically a steepy railway where two special rail cars, each attached to opposite ends of a long cable,  are used for climbing and descending an hill. As one goes up hill, the other goes down, and they cross in the middle. Three of these lines (Funicolare di Chiaia, Funicolare di Montesanto and Funicolare Centrale) run from the hilltop Vomero neighborhood to various parts of downtown; the fourth runs from near Mergellina seaside district to the top of Posillipo Hill (Funicolare di Posillipo). The funiculars can be a time-saver, some of them have scenic views during the journey (Montesanto and Posillipo), and all of them reach locations where you can view gorgeous panoramas of the entire city.

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OTHER DESTINATIONS:

You can reach Sorrento, Capri, Ischia, and other islands by boat (ferries or fast hydrofoils) from the Molo Beverello Maritime Station at the foot of P.za Municipio, Capri and Ischia also from Mergellina (fast hydrofoils). Tickets can be purchased on a walk-up basis. Multiple companies and boats depart each day about every 30 minutes, subject to seasonal availability.

You can reach Pozzuoli, Cuma and all the volcanic Campi Flegrei area (sandy beaches, lakes and archeological sites) by Cumana commuter train, that departs from Montesanto every 20 minutes.

 All the other main regional destinations are served by train or bus lines.