A water treatment plant in Georgia earlier this year. Officials have long warned that the nation’s roughly 150,000 water treatment systems are relatively easy targets for hackers.

Andy Burnham in Ashton-in-Makerfield, England, in June. Mr. Burnham is on the verge of becoming prime minister.

The median along Park Avenue is already planted with trees, grass and flowers, but is not welcoming to pedestrians.

Prime Minister Mark Carney of Canada announcing a sovereign wealth fund on Monday in Ottawa.

The Arkansas Valley Conduit would provide clean water to 50,000 Colorado residents by diverting water from the Arkansas River, seen here at the base of the dam of the Pueblo Reservoir.

New commuter train tunnels are set to be built under the Hudson River in a project known as Gateway. New York has been a main target of the Trump administration’s push to freeze and claw back federal funds from states.

Twenty of the 472 stations in New York City’s sprawling subway network had to be temporarily closed on Monday night.

So is the bus.

Amir Alavi, center, an engineering professor at the University of Pittsburgh, is one of the leaders of a project using artificial intelligence in transportation projects in Pennsylvania.