information:classification, structural:reformatting
Public transport

Curitiba's public transportation consists entirely of buses. It opened the world's second bus rapid transit (BRT) system, Rede Integrada de Transporte, in 1974. The popularity of Curitiba's BRT has effected a modal shift from automobile travel to bus travel. Based on 1991 traveler survey results, it was estimated that the introduction of the BRT had caused a reduction of about 27 million auto trips per year, annually saving about 27 million liters of fuel. In particular, 28 percent of BRT riders previously traveled by car. Compared to eight other Brazilian cities of its size, Curitiba uses about 30 percent less fuel per capita, resulting in one of the country's lowest rates of ambient air pollution. Some 1,100 buses make 12,500 trips every day, serving more than 1.3 million passengers, 50 times the number from 20 years ago. Eighty percent of travelers use the express or direct bus services. Curitibanos spend only about 10 percent of their income on transportation, far below the national average.

Curitiba has in its transport fleet the largest bi-articulated bus in the world, with 28 meters in length and capacity for 250 passengers. The bus operates only with soy-based biofuel, which reduces pollutant emissions by 50%.

The city government has been planning to introduce an underground metro for a number of years and in 2014 announced opened tenders for a 35-year public private partnership contract to build and operate a 17.6 km (10.9 mi), 14-station north–south line. The cost is estimated at 4.62 billion reais.