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.

When different generations of cars are combined into one train, it messes with the loudspeaker system.

I'm surprised when I see someone doing the logical, commonsense thing: Walk facing the oncoming traffic.

Automate the headlights so drivers can't forget to turn them on in low visibility.

I don't know of any source for online maps showing the platform, stairs, escalators, elevators, mezzanines and other station details.

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.