Officials in Morocco say it is time to regulate the trans-Mediterranean traffic rather than leave the underground networks to do their worst.

ECONOMIST: Morocco

The young inventor envisages PaveGen systems being used to power off-grid appliances such as public lighting, illuminated street maps and advertising, and to be installed in areas of dense human traffic such as city centers, underground stations and school corridors.

CNN: Green sidewalk makes electricity -- one footstep at a time

Traffic will flow through high-speed underground roadways and aboveground interchanges.

FORBES: American Pyramids

And the alternative often is a traffic-slowed bus, or a crowded underground train traversing a highly walkable distance.

WSJ: Timing an Urban Stroll Isn't a Walk in the Park

London's West End should have an extended weekend Underground service, a fleet of electric buses and more traffic-free days, says a new report.

BBC: London's West End needs 'better governance and transport'

CHICAGO, Illinois (CNN) -- Thick black smoke poured from an underground electricity vault fire Thursday in downtown Chicago, forcing police to halt traffic in the famous Loop.

CNN: fire

The HS2 project has not considered the cost of lost time for commuters, disruption to the Central Line on London Underground, and the loss to businesses as people might be put off from going to the area because of the traffic, she added.

BBC: Protest against overground HS2 route through Ealing