Physical geography of part of the Baixada Fluminense in the strict sense (from Queimados to Guapimirim) The Baixada Fluminense, in the broad sense of the term, presents variable width: it is quite narrow in the initial stretch of the "Sepetiba Lowlands" (the section extending from the municipality of
Mangaratiba to the Coroa Grande neighborhood, in
Itaguaí, between the Serra do Mar and
Sepetiba Bay), and gradually widens eastward until the
Macacu River, in the "Guanabara Lowlands" region, which extends to the municipalities of
Guapimirim and
Cachoeiras de Macacu. In this stretch, within the municipality of
Rio de Janeiro, between the West Zone (Sepetiba Lowlands), North Zone and South Zone (Guanabara Lowlands), rise the
massifs of
Pedra Branca Massif and
Tijuca Massif, which reach altitudes slightly above one thousand meters. From
Guanabara Bay to
Cabo Frio, along the "Araruama Lowlands" sector, the Baixada Fluminense narrows again, presenting a succession of small elevations between 200 and 500 meters in height: the so-called "coastal massifs of Rio de Janeiro state". From the stretch between the district of Rocha Leão, in
Rio das Ostras, and the neighborhood of Imboassica, in
Macaé, the Baixada Fluminense widens once more in its final sector, the "Goytacazes Lowlands", reaching its greatest extent in the delta of the
Paraíba do Sul River, in the region of
Campos dos Goytacazes and
São João da Barra, in northern Rio de Janeiro state. In a broad sense, the Baixada Fluminense is considered the central axis of the state of Rio de Janeiro, encompassing the state capital, part of the Costa Verde, the municipalities of the far western metropolitan area, all municipalities surrounding Guanabara Bay, the coastal lowlands (including the seven municipalities of the
Lagos Region) and some municipalities of northern Rio de Janeiro state. It is crossed by some of the main highways of the state and of Brazil, such as the
BR-101 (which runs through the Costa Verde, metropolitan region, coastal lowlands and northern Rio de Janeiro, thus crossing the entire Baixada Fluminense), the
BR-040, the
BR-116 and the
RJ-106. It is also crossed, within the
metropolitan area, by the railway lines
Santa Cruz (entirely within the municipality of Rio de Janeiro),
Japeri,
Belford Roxo,
Saracuruna,
Paracambi (whose route reaches the tourist region of the
Vale do Café),
Vila Inhomirim and
Guapimirim, all operated by the suburban rail concessionaire
SuperVia; the region was also formerly served by the railway lines
Niterói,
Itaguaí,
Mangaratiba and Campos (the latter being the only one of these lines that served an inland municipality of the state).
Divergences regarding its limits Regarding the municipalities that belong to the Baixada Fluminense, there is consensus concerning
Duque de Caxias,
Nova Iguaçu,
São João de Meriti,
Nilópolis,
Belford Roxo,
Mesquita,
Queimados (all north of the city of Rio de Janeiro) and
Japeri, municipalities of Greater Iguaçu, where a large part of the
consolidated periphery of the
Rio de Janeiro metropolis is located. However, some authors consider, in addition to the eight municipalities mentioned, the municipalities of
Guapimirim,
Magé (to the east),
Paracambi,
Seropédica and
Itaguaí, which originated from the partition of the former municipalities of Magé and Itaguaí during the 20th century and encompass a significant part of the
expanding periphery of Greater Rio, as part of the region. In addition, the municipality of
Mangaratiba is also sometimes considered part of the Baixada Fluminense in the strict sense (which refers to the area where the urban expansion of the Rio metropolis occurred), since the municipality is the first in the region in the broad sense (referring exclusively to the physical geography of the state); with these limits, the Baixada Fluminense in its most comprehensive conception becomes even more extensive, composed of 14 municipalities, beginning in Mangaratiba and ending in Guapimirim.
Comparison between the Baixada Fluminense and the East Metropolitan Region Like the Baixada Fluminense, the
East Metropolitan Region (East Fluminense or Greater Niterói), composed of the municipalities of
Niterói,
São Gonçalo,
Itaboraí,
Maricá,
Tanguá,
Rio Bonito and
Cachoeiras de Macacu—the seven municipalities historically most integrated with each other and with
Rio de Janeiro (especially with the
Central Region) east of
Guanabara Bay—, also grew as an expansion of the
Rio de Janeiro metropolis, However, these two regions differ considerably from one another, as they developed in quite distinct ways. The Baixada Fluminense grew as the immediate periphery of
Rio de Janeiro, through the direct expansion of the city's urban footprint into the portion of the former state of Rio de Janeiro located north of the then Federal District—an area of lowlands situated between the territory corresponding to the present municipality of Rio de Janeiro and the
Serra do Mar. Thus, the Baixada Fluminense and the East Metropolitan Region each have their own identity, and the municipalities composing each region share characteristics that clearly distinguish them. Due to their origin and development, the East Metropolitan Region has a certain degree of autonomy in relation to
Rio (largely due to the role played by the city of Niterói), whereas the Baixada is highly dependent on the capital. Municipalities in the East Metropolitan Region tend to interact more with each other than those in the Baixada, while municipalities in the Baixada generally maintain a stronger connection with the center of the capital than those in the East Metropolitan Region. This can be observed in commuting patterns within the metropolitan area and in the destinations of urban public transport lines available in these two regions. Internal connections between the seven municipalities of Greater Niterói are made via intermunicipal bus and van lines. Transport between these municipalities and the city of Rio de Janeiro is carried out directly (departing from each of the seven municipalities) by road transport (buses and vans), and from Niterói by ferries. Intermunicipal bus lines (departing from the thirteen municipalities of the Baixada Fluminense) and vans also connect the Baixada to the Central Region of Rio. As for circulation within the Baixada Fluminense, although there are bus lines connecting all municipalities to each other, there are no intermunicipal vans operating these same routes. ==History==