Wikipedia
Transantiago is a public transport system that serves Santiago, the capital of Chile. It is considered the most ambitious transport reform undertaken by a developing country according to the World Resources Institute.
The system, largely influenced by Bogotá, Colombia's TransMilenio and Curitiba, Brazil's RIT, was introduced on February 10, 2007. It standardized bus routes and eliminated redundancy of same; redundancies were commonplace in the old system, which was run by thousands of independent bus operators. The system combines local (feeder) bus lines, main bus lines and the Metro (subway) network. It includes an integrated fare system, which allows passengers to make bus-to-bus or bus-to-metro transfers for the price of one ticket, using a single contactless smart card.
Transantiago's implementation was problematic, as the decreased bus fleet and the newer routes have proved insufficient to properly serve a population inadequately informed of pending changes. The major complaints are the lack of buses and their inconsistent frequencies, missing or poor infrastructure (such as segregated corridors, prepaid areas and bus stops), the network's coverage, and the number of transfers needed for longer trips. As a result, users have overcrowded the Metro, which is generally held to be fast and dependable.