from what i seen, not sure why he ended up on that road, but he saved few lives and doing so risked to be killed. and would be for sure if there were no those few that defended him.
His reaction in that last moment to go left and not run over guy on the ground was really good, also he had an opportunity after the stop to continue full throttle but he was moving slow enough to not hurt anyone.

i do understand what @pfunk is saying but there was a chance that he could be killed because he did not want to run over anyone. also after this i seen posts of truckers where they say they will not try to stop in this kind of situations, because they don't want to die.