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.

Drivers tend to look for other drivers, rather than for pedestrians or cyclists.

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

Over the decades, you got various companies involved in making escalators and you've got Metro varying between internal repair crews and contractors. They're dealing with old equipment, which of course is prone to break down, and the repair crews don't even know what's busted or who made the busted parts till they tear the things open. Then sometimes they have to go back to the shop and manufacture parts, because the original maker has gone out of business.

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

When I look at the faces of turning drivers, I mostly see them looking in the direction of oncoming motorists rather than at the people they're about to turn into.