How to get from Rio International airport (GIG) by Bus (BRT Buses)
BRT (Bus rapid transit) has two types of bus services from GIG to central Rio.
Transcarioca express route
TransCarioca line
Transcarioca express route
Buses on this route only stop at Fundao terminal, Madureira and Vicente de Carvalho station ( just within the subway station) before making a final stop at terminal Avlorado.
Tip: Taking Transcarioca express route buses is the cheapest way to get from GIG to Copacabana, alight at Vicente de Carvalho station from where you can catch the metro to Copacabana, I use it all the time, it's very cheap and convenient, plus it saves on time.
TransCarioca line
Buses on transcarioca also follow the same route as express buses from GIG to terminal Alvorado but make stops at 47 stations and 5 terminals along the way.
Just outside terminal 1 arrivals leave through door H
Outside terminal 2 arrivals leave through door D.
BRT Bus fare
Tickets cost R$4 and can be purchased at ticket offices in both terminals just before you get to to the bus parking lots.
You'll be given a prepaid transport card (Bilhete Unico Carioca) that you can use to pay for public transport across Rio.
Advantage of taking BRT
BRT have their own bus lanes in all of Rio, you avoid the traffic and it saves so much time, though I wouldn't advise taking BRT if you have too much luggage or are new in Rio, it'll get you frustrated, in this case, best option would be to take a taxi.