More on self-driving cars

We have posted a number of times about self-driving cars, including about how they'll be regulated. Go, for instance, here, here, and here. So, now, read this article by Ashley Halsey III about a spin around D.C. in a driverless car.

And, then, read the 15 things you need to know about driverless cars,including when we'll see them on the road and what they'll cost. And here's one: Will they be safer?

Yes, experts say. Driver error causes the overwhelming majority of crashes — 93 percent of them, according to one federal report — and there are more than 5 million crashes each year. Just getting intoxicated drivers from behind the wheel could reduce fatalities by 39 percent.