In her mind, she holds an alternative map of the centre of the city: one which, instead of modern buildings and highways crowded with traffic, has ancient walls, baths and residences dating back to Roman, Hellenistic and even prehistoric times.

BBC: Working Lives Athens

At a time when planes are becoming more crowded, air traffic is growing and air traffic control con- tinues to be run with obsolete technology, gratuitously retiring veteran pilots is both preposterous and an air-safety hazard.

FORBES: Magazine Article

After all, they have theirs and more people simply means more traffic, congestion and crowded schools.

FORBES: For A Preview Of Obama's America In 2016, Look At The Crack-Up Of California

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

For five hours this Sunday, some 10 miles of normally car-crowded Los Angeles streets will be closed to vehicular traffic and turned into a massive block party for cyclists, pedestrians, joggers, even stilt-walkers.

FORBES: LA's 10-Mile-Long Block Party

On this warm day, the rattle of Tehran's chaotic traffic comes in through the open window of a small room crowded with sewing machines.

NPR: Iran's President Sets Out to Ease Unemployment

With traffic jams, the problem is inadequate information: cars on crowded roads cannot see the big picture that might allow them to make good decisions.

ECONOMIST: Collective intelligence

Some assume a walk in a crowded urban area will be slower than in a park, while others ignore stops at traffic lights.

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