Regarding the spot of landings. It's worth pointing out that the exact same plane had an engine out problem in the exact same area about 10 years ago. Landed on the same highway without any issues. So it seems the highway is preferable in that particular locale.
Further, the landing would have been fine (it's a 3 lane higway with a wide soft shoulder, I've actually driven on it further north...it's a typical American "super wide" highway.) Would have been fine provided there wasn't a car parked on the side of the road...