Self-driving truck startup TuSimple is partnering with automotive supplier ZF to develop and produce autonomous vehicle technology, such as sensors, on a commercial scale.

The partnership, slated to begin in April, will cover China, Europe and North America. The two companies will co-develop sensors needed in autonomous vehicle technology such as cameras, lidar, radar and a central computer. As part of the partnership, ZF will contribute engineering support to validate and integrate TuSimple’s autonomous system into the vehicle.

TuSimple launched in 2015 and has operations in China, San Diego and Tucson, Ariz. The company has been working on a “full-stack solution,” an industry term that means developing and bringing together all of the technological pieces required for autonomous driving. TuSimple is developing a Level 4 system, a designation by the SAE that means the vehicle takes over all of the driving in certain conditions.

TuSimple has managed to scale up its operations and attract investors even as other companies in the nascent autonomous vehicle technology industry have faltered. The company has raised nearly $300 million to date from investors such as Sina, UPS and Tier 1 supplier Mando Corporation. It’s now making about 20 autonomous trips between Arizona and Texas each week with a fleet of more than 40 autonomous trucks. All of the trucks have a human safety operator behind the wheel.

The partnership is an important milestone for TuSimple as the startup prepares to bring autonomous-ready trucks to market, TuSimple chief product officer Chuck Price said in a statement. The plan is for TuSimple to combine its self-driving software with ZF’s ability to build automotive grade products.

The partnership doesn’t remove every barrier for TuSimple. Moving from development to deployment takes millions of dollars of investment. If a company can move from testing to commercial deployment, it must still navigate daily operations efficiently in the aim of becoming profitable.