Tesla Chief Executive Elon Musk said the company will increase the size of its robotaxi fleet in Austin, Texas, next month. The move follows the launch of Tesla’s self-driving ride service in the city in June.

Musk made the statement in a post on X on Tuesday. He said the Austin fleet “should roughly double” in December. He did not give current figures for the number of vehicles.

Tesla operates robotaxi services in Austin and the San Francisco Bay Area. The vehicles still carry safety monitors. The company has said they remain in place as development continues.

Tesla also received approval last week to run a ride-hailing service in Arizona. The permit allows the company to expand operations beyond its first two markets.

Musk has repeatedly outlined broad plans for the service. In October, he said he expected robotaxis to run without safety drivers in large sections of Austin before the end of the year. He also said the service could reach eight to ten metropolitan areas by year-end.

In July, Musk said he believed Tesla robotaxis would be available to about half of the U.S. population by December. He did not provide details on how the company would meet that target.

The industry has seen a series of setbacks in recent years. High development costs, strict regulatory oversight and several federal investigations have slowed progress for many firms. Some companies halted programs after failing to reach commercial scale.

Activity has increased in recent months. Tesla has expanded testing and service zones. Alphabet’s Waymo has added new routes and service areas. Amazon’s Zoox has also moved ahead with trials and limited operations.

The companies are competing to secure early positions in the market. Each is working to reduce costs while improving safety and reliability.

Regulators continue to monitor the sector. Agencies have focused on safety-driver requirements, crash reports and technical performance. Companies must show consistent results as they push for broader approval.

Tesla has not said when it expects to remove safety monitors from all vehicles. The company has also not outlined when it plans further expansions beyond Austin, the Bay Area and Arizona.