BR-040 (Brazil highway)

In the year 1926 President of the Republic Washington Luís declared to the nation that "governing means opening roads". By 1927, Brazil had 93,682 cars and 38,075 trucks. The Federal District and the State of Rio de Janeiro counted 13,252 cars and 5,452 trucks. One of the priorities was the Rio-Petrópolis highway, especially since the national press had heavily criticised the abandonment of the road to the Imperial City. Nevertheless, torrential rain poured down for two summers, washing away the sand and gravel required to surface the road. Impassable ruts formed on the tarmac. One newspaper commented on the delays, at a time when coupés, cabriolets and cockroaches all boarded the wagons of the Leopoldina.

The tools of the day were the pick, shovel, hoe and donkey cart. An outbreak of malaria occurred in the lowlands, while in the mountains of Petrópolis workers were forced to live in makeshift accommodation. President Washington Luís, alongside his ministers and regional authorities, inaugurated the Rio-Petrópolis highway on the 25th of August 1928. The road measured eight metres wide. The next day was a Sunday. No less than 1,783 cars took to the road, causing a reporter to compare the long, slow queues to those of Avenida Central. Just two days later, many road users admitted to being frightened by the sheer height of the trucks. Three years later, the 22 km (14 mi) mountain stretch was being surfaced. Three flyovers were built high above the rocky valley floor.

The former Rio-Petrópolis was long considered the finest highway in South America. In the 1950s the Petrópolis bypass was built, linking Itaipava to Xerém. This then became used as a route down from the mountains. Currently the old Washington Luiz serves as access road from the BR-040 to the arrival at Petrópolis (Quitandinha). Then, the Rio-Juiz de Fora meets the Rio-Teresópolis highway (BR-493 and BR-116).

This stretch replaced the old Union and Industry road, the first Brazilian highway, which opened in 1861. Work began in 1975 and lasted 5 years, being completed on 15 June 1980. The finished road crosses mountainous, hilly and flat zones and is dual carriageway (14.40 m (47.2 ft) wide) throughout, although single carriageway was present from Matias Barbosa to the outskirts of Juiz de Fora until upgraded by Concer between 2005 and 2009 as far as km 773.

On the 138 km (86 mi) long journey from Petrópolis to Juiz de Fora, the BR-040 passes through seven municipalities. Traffic volume is around 7000 vehicles per day on this route with less from Rio-Bahia, according to the DNIT. On the 1st of March 1996, the stretch from Rio de Janeiro to Juiz de Fora was privatised and is under management for a period of 25 years by Concer. There are three tolls on the road, two in Rio de Janeiro at km 104 (Duque de Caxias) and km 45 (Areal) and one in Minas Gerais at km 814 (Simão Pereira)

This stretch is 260 km (160 mi) long and corresponds approximately to the route of the Caminho Novo which opened in the Eighteenth Century. In the 1930s the road was straightened and extended to Belo Horizonte. On the 1st of February 1957 the BR-3 highway was officially opened by then president Juscelino Kubitschek. In 1982, the highway was widened from Belo Horizonte to the junction with the BR-356 for Ouro Preto, as was the stretch from Alfredo Vasconcelos to Serra da Mantiqueira near Santos Dumont. It was widened all the way to Juiz de Fora, except sections on bridges and overpasses. Since the mid-1990s further stretches have been widened.

Several danger spots are present on the highway such as the Curva do Ribeirão do Eixo (Km 588), Viaduto do Túnel (Km 756) among others. The most dangerous part of the road is the 90 km (56 mi) section between Conselheiro Lafaiete and the state capital.

In 1970, Toni Tornado won the Festival Internacional da Canção with soul song BR-3.

Between the capital of Minas Gerais and Sete Lagoas the road is dual carriageway. From there on until Brasília the BR-040 is single carriageway. Over the years the northern part of Minas Gerais has developed and the increasing flow of vehicles, mostly trucks loaded with coal for steel works, has made the journey untenable. Long delays during festive periods were commonplace. Roadworks were planned to widen the BR-040 highway by the Federal Government in January 2007, beginning with the stretch between Sete Lagoas and the junction with the BR-135 at o Trevão de Curvelo. Altogether a 48 km stretch was widened, with two lanes on each side separated by flowerbeds. Only small sections of road remain under construction, with most of them already receiving traffic. Further bridges and viaducts have been scheduled for construction. In the case of Paraopeba, traffic now bypasses the city whereas before it passed through. According to the DNIT, this stretch has a daily flow of around 15,000 vehicles. It is of strategic importance for the region's raw material industries including coal.