Next time you drive over the (beautiful) Golden Gate Bridge, and stare into the traffic that's going the other way -- with drivers perhaps distracted by the wonderful view -- it may be worth knowing that (1) there's an easy way to stop head-on collisions on that bridge, one that's been used with great success on other bridges (including the Coronado Bridge down in San Diego), but (2) even though it's been strongly recommended that California install such a device on the bridge for over a decade, California hasn't felt like doing so. With numerous serious injuries as a result.
But that's okay. No liability.
Whether that's the correct moral choice, of course, is a separate question.
