"To assist the driver" means helping the person who is driving by providing support or aid in various ways to ensure a safer and more efficient travel experience. Full definition
These systems greatly assist the driver in maintaining the safest speed according to the driving environment. (euroncap.com)
This is what's called a Level 2 partial automation system, which assists the driver with some tasks, but still relies on the driver as the primary monitor of the driving environment. (digitaltrends.com)