From what I understand and correct me if I am wrong. After a certain speed the ship is destroyed. Radar today cannot detect small particles/meteors in space out far enough to make adjustments at speeds needed for interstellar travel currently.
To conclude the least time spent in space after a certain speed decreases the risk of collision. The faster the ship travels the narrower the collision window. Avoidance would still currently be the best option. Although we cannot scan the flight path ahead to make coarse adjustments, probes could travel ahead of ship and laser relay back to the mother ship coarse corrections do to debris that may trigger the net between them.
