I think that maps showing platform details would be useful to visitors, especially to chaperones of school groups, etc. Also useful would be either a compass rose or an arrow pointing North at every metro exit. Emerging from underground is disorienting, especially at night.

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

Many Saturday mornings, I take 495 from Fairfax to Maryland in the morning, and I'm astonished by the speed of many of the drivers. Even when I drive 70 mph, I'm being passed by people driving 80-90+ at times.

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

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.

If the Metro general manager, Paul Wiedefeld, says those extra hours for maintenance are necessary to help fix the system and make it safer, then that gets top priority.

Many police officers watch for vehicles without headlights because it's a telltale of a drunk driver.