The driver of a vehicle within an intersection intending to turn to
the left shall yield the right-of-way to any vehicle approaching from
the opposite direction which is within the intersection or so close
thereto as to constitute an immediate hazard, but said driver, having
so yielded and having given a signal when and as required by this
chapter, may make such left turn and the drivers of all other vehicles
approaching the intersection from said opposite direction shall yield
the right-of-way to the vehicle making the left turn.