Nobody likes paying tolls. It's difficult to explain the concept of dynamic tolling, where the price varies to maintain the flow of traffic. And it's difficult to explain why highway widenings don't wind up helping commuters in the long run.

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

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.

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.

It would be helpful to be able to see the layout and for the maps to label what exits to use to get to nearby sites/buildings so you aren't wandering the station trying to read the signs in the crowds.

I can't see a problem with imposing fines on drivers who violate traffic safety laws. The speed limit is the speed limit. A red light means stop. These things haven't changed since people got their driver's licenses.

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