SafeTrack - I keep saying this - is not going to fix Metro. It's a speeded up track work program, compressing three years of already planned work on the track bed into about a year.

Metro, built in the late 20th century, is the most escalator-dependent system in the world.

As our eyes age, they have a tougher and tougher time adjusting to rapid changes in lighting, and we need to be aware of this.

Seems like people could behave themselves without making a calculation regarding how likely or unlikely they are to kill other people.

I don't believe any sort of traveler does a better job than any other sort of traveler at obeying traffic safety laws. It's difficult to foresee a camera program that can be used with bikers and walkers.

I love the cameras and don't mind mailing in my check when I fail to pay attention and go too fast.

The cars themselves are getting smarter and will be increasingly able to assist drivers - to the point where the cars will be completely automated.