Transportation

The idea is that as cracks appear in the road the capsules break open, releasing the oil within and softening the asphalt around it. This helps the asphalt ‘stick’ back together, effectively filling in cracks and preventing small defects from deteriorating further.

Electrification is at a tipping point in California, expanding into the heavy-duty sector with the buy-in of transit agencies across the state.

"Southwest and Sun Country both go well and at some point down the road, we’ll see what happens," Ellestad said. "It’s about building relationships and keeping in front of them."

Autonomous vehicles don’t have to destroy the American city–they’re a shiny opportunity to rebuild it for the better. Cities just need to get to work. Right now.

For the past five years, engineers and test drivers have been running dozens of cars through their paces in order to better prepare them for real-world scenarios of rude drivers and clumsy movers.

Properly channeled, the three transportation revolutions can make our communities stronger. But it will take the steadfast support of strategic planners, using our best available tools, to achieve our best-case transportation future.

"Many of the things that we’re doing in self-driving at the moment probably wouldn’t work if we were trying to do it in a third-world country,"

A science-led revolution is in the making in transportation.

Mary T. Barra, G.M.’s chief executive, told analysts that the company was also looking at potential markets for self-driving vehicles outside the United States. "Absolutely, we are going to be looking globally," she said.

The Los Angeles County Metropolitan Transportation Authority has launched a pilot to study cheap, on-demand, door-to-door transit service.