Oncoming drivers around intersections must exercise their own precautions.
They must remain aware and anticipate possible risks. Furthermore, they may
need to maintain the speed limit and take precautions to slow down before
approaching red lights and stop signs. Oncoming drivers may also need to
take actions to mitigate collisions if they note a potential problem,
including a left-turning vehicle that has already entered the lane.
Ultimately, if the oncoming driver can avoid the accident altogether by
exercising ordinary and reasonable care, they must do so or bear a portion
of the fault.