I keep seeing more cars and motorcycles on Delhi's roads, but people say there cannot be too many auto-rickshaws. Who decides how many autos are allowed, and why is there no similar limit on private vehicles?

The auto cap came from the Supreme Court, not the ordinary workings of the Delhi government, and it exposes a deep inconsistency in how the city treats vehicles that earn a living against vehicles that do not. In 1997, hearing the long-running pollution case M.C. Mehta v. Union of India, the Court stopped Delhi from issuing new auto permits except to replace an existing auto. The ceiling was later raised and, in 2011, fixed at one lakh. In 2024 the Court refused a manufacturer’s plea to relax it, holding that the limit protected the environment.

An auto therefore needs more than ordinary registration. Because it carries passengers for payment, its owner must also hold a commercial transport permit, and governments and courts have treated the total number of such permits as something to be capped. A private car or motorcycle needs no such permit. Meet the registration, tax, safety, and emissions rules and you may ordinarily register one. Delhi restricts old vehicles and may regulate new fuels, but it sets no numerical ceiling on private cars or two-wheelers. By March 2026 the city had about 87.6 lakh registered vehicles, nearly 59.3 lakh of them two-wheelers.

The strongest case for capping autos is that road space is scarce, and every added vehicle worsens pollution and congestion. But that argument does not stop at the auto. Cars take road space and foul the air too, often carrying a single passenger. The original cap answered a specific harm, the heavily polluting two-stroke engine. Autos later moved to cleaner CNG, and in 2018 the Environment Pollution (Prevention and Control) Authority recommended scrapping the ceiling, arguing that it had raised transaction costs, enriched financiers and permit intermediaries, and weakened an important form of public transport.

A scarce permit also grows a price of its own. Rather than letting a new driver buy an auto and start work, the system pushes him to rent, or to pay whoever already controls a permit. So the question is not whether Delhi may manage its traffic. It is why it rations the livelihood vehicle while letting the private vehicle multiply unchecked. A consistent policy would target the actual harms of road use, congestion, and emissions, and it would target them whether the vehicle is an auto, a motorcycle, or a car.