Self-driving truck startup TuSimple has signed a deal with California-based AEye to co-develop lidar sensors, expanding its roster autonomous trucking partners.

AEye produces lidar sensors, which use spinning lasers to conduct 360-degree scans of a vehicle’s environment by bouncing laser pulses off surrounding objects.

In a joint statement released on Wednesday, TuSimple said that the deal reflects its confidence in AEye’s technology that can help self-driving trucks running at highway speeds detect obstacles up to 1,000 meters away and even in poor weather conditions.

AEye is not TuSimple’s only partner. The company is also partnering with U.S. truck-maker Navistar to develop self-driving trucks powered by Level 4 technology, the second-highest level of autonomy, which allows a vehicle to drive itself under most circumstances with no human intervention. TuSimple is also working with German auto-parts maker ZF to co-develop a central computing platform and a sensing system for self-driving trucks.

Related: TuSimple’s Self-Driving Truck Tech Cuts 10 Hours From Full-Day Route

Contact reporter Ding Yi (yiding@caixin.com) and editor Heather Mowbray (heathermowbray@caixin.com)