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Articles on Traffic congestion

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The mathematical modelling of traffic networks can throw up conflicting results. Flickr/Wendell

The maths of congestion: springs, strings and traffic jams

The planning for any new road should include plenty of mathematical modelling. But getting the right numbers can be a challenge and there’s the odd paradox to deal with as well.
Tunnel vision: the claim that more roads equals less congestion fails to see the wider picture. AAP Image/Dean Lewins

Do more roads really mean less congestion for commuters?

A new road may provide motorists with some level of respite from congestion in the short term. But almost all of the benefit from the road will be lost in the longer term.
The slow pre-dawn commute on the M5 from western Sydney is more than a pain for these drivers: it comes at a high social and economic cost. Dean Lewins/AAP

Sydney’s stuck in traffic, putting the brakes on women and the west

Our new analysis reveals nearly a third of full-time workers in Sydney commutes for more than 10 hours a week. Those workers are spending almost three full weeks a year just to get to and from work.
This wouldn’t have happened in standstill traffic. EPA

London’s congestion charge increases speed and saves lives

London has long been one of the world’s most congested cities. Before a £5 “congestion charge” was introduced for vehicles entering the city centre, cars would spend a third of their time in peak hours…

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