Self-driving trucking company TuSimple is hitting the brakes on its aggressive growth plans. The Wall Street Journal reports that the company plans to cut potentially at least half of its workforce this week, a retrenchment that follows upheaval at a firm that also faces regulatory scrutiny.

The autonomous-truck business removed its CEO in October after a board examination of TuSimple’s relationship with a Chinese startup, and it faces multiple federal investigations. Now the company is scaling back its work on building autonomous systems and testing self-driving trucks on public roads in Arizona and Texas. 

TuSimple is also eliminating operations in Tucson, Arizona, where it does much of its test driving, and paring back its work on the algorithms for the self-driving software. Instead, the company is focusing on building out software that matches self-driving trucks with shippers that have freight to haul, driving into a busy load-matching space.