New York taxi medallion prices are plummeting as ride sharing takes off in the city, but the head of the Taxi and Limousine Commission insisted that her industry is not in danger of collapse.

After hitting an all-time high of $1.3 million in April 2013, the price of a taxi medallion has fallen by nearly a quarter of its value to roughly $840,000, according to New York City's TLC. That drop represents a major turning point for yellow cabs—there had never been a price decrease before 2013—and the shift could be tied to the changing nature of transportation in the city.