Nearly 14,000 Uber and Lyft drivers in New York have signed up to join the local branch of the Amalgamated Transit Union, according to a union spokesperson. The group plans to rally at the NYC Taxi and Limousine Commission (TLC) headquarters next week to demand a formal vote on unionizing.

The 14,000 sign-ups exceed the 30 percent threshold that federal regulators say must trigger an official vote, the union says. The cards signed by drivers indicate that they seek ATU membership and authorize the union to act as their collective bargaining agent.

In May, Uber struck a deal with the International Association of Machinists and the independent Freelancers Union to form a new Independent Drivers Guild that would represent their workers. While not an official union, the Guild is open to the 35,000 drivers Uber says it employs in New York.