https://phys.org/news/2018-07-six-year-boom-york-mull-uber.html

The nightmare of getting behind the wheel in traffic-clogged streets, the astronomical cost of parking and poor public transport in outlying neighborhoods has seen demand for these services skyrocket since they were first introduced to America's most populous city in 2012.

Today around 80,000 drivers work for at least one of the big four app-based companies, compared to 13,500 yellow cab drivers in New York, according to a new study commissioned by the Taxi and Limousine Commission (TLC).