Skip to main content

Car traffic in London is down but congestion is up, says new study

London Congestion Trends, an in-depth study of the causes of traffic congestion in London between 2012 and 2015 published by Inrix, indicates that congestion in London is increasing, with journey times in Central London growing by 12 per cent annually. Inrix says this is consistent with data that shows that the London economy and population are growing, which normally results in an increase in gridlock. Further, unemployment and fuel prices are down, both of which usually mean a rise in traffic. Despite thi
May 18, 2016 Read time: 3 mins
London Congestion Trends, an in-depth study of the causes of traffic congestion in London between 2012 and 2015 published by 163 Inrix, indicates that congestion in London is increasing, with journey times in Central London growing by 12 per cent annually. Inrix says this is consistent with data that shows that the London economy and population are growing, which normally results in an increase in gridlock. Further, unemployment and fuel prices are down, both of which usually mean a rise in traffic. Despite this, car travel, defined as private cars, taxis and private hire vehicles (PHVs), has decreased in the Congestion Charge Zone and Central London since 2012 and overall demand for road travel has remained flat.

The analysis also found that there is a much greater reliance on public transport and other modes, to meet the demand for travel fuelled by London’s strong economic growth and record population levels. Of note, London Underground saw passenger numbers increase by 3.2 per cent from 2014 to 2015 – surpassing the levels seen during the 2012 Olympic Games, while cycling has also seen a dramatic upturn, with 12 per cent more people commuting to work and travelling by bike in the past year alone.  

The report says this may explain flat traffic volumes in London, but it does not explain increasing congestion. Road supply is restricted by planned and unplanned incidents and between 2012 and 2015, the duration of planned roadworks in London rose by 362 per cent, resulting in 2,437 hours of disruption, one of the primary causes of increased congestion in the capital. The number of hours roads were disrupted by unplanned incidents, such as accidents, also increased, rising by 23 per cent over the same period.

Another cause of increased gridlock in London is likely a result of the booming ecommerce market, which is expected to top US$87 billion (£60 billion) in the UK in 2016. This may have spurred a sharp increase in the number of delivery vans on London’s roads. For example, the study found that the volume of light goods vehicles (LGVs) in the Congestion Charge Zone, which account for more than 17 per cent of all vehicles, is increasing year-on-year, and increased by 7.7 per cent over the study period.

“It is easy to speculate on the causes of congestion in London, but solving this problem requires a deeper understanding and awareness of the true factors,” said Dominic Jordan, chief data scientist, Inrix. “Through road improvements, 1466 Transport for London is making significant efforts to future-proof the city, which will benefit both road users and the London economy. However, our study shows that roadworks like these, as well as a rise in goods vehicles, are the major causes of congestion in the capital.”

David Leam, Infrastructure director at non-profit organisation London First, commented: “London’s roads are increasingly congested, but this isn't down to a boom in car journeys. As this report shows, car traffic is actually decreasing in central London, while van traffic and roadworks have risen significantly. What's needed is for the new Mayor to ease off excessive roadworks, build new river crossings, devise a plan for managing freight, and revisit measures to control congestion, including charging.”

Related Content

  • March 11, 2015
    Data exploits parking potential
    David Crawford parallel parks with innovations in two continents. Surveys of US cities indicate that drivers searching for parking can account for up to 37% of all urban traffic congestion. A 2011 study by IBM of 20 cities around the world found that nearly six out of ten drivers had abandoned their search for a parking space at least once; while motorists generally spent on average 20 minutes looking for a sought-after spot.
  • May 6, 2015
    Arup’s vision of urban mobility in 2050
    Arup’s vision of the Future of Highways considers a wide range of factors that will impact on mobility towards the middle of the century. In its consideration of the Future of Highways through to 2050, international consultants Arup has taken a broad and pragmatic view of where society is heading and the effects that will have on the transport requirements. In terms of major drivers it not only cites
  • March 28, 2017
    ACRS calls for Australian Government to commit to eliminating road trauma
    The Australasian College of Road Safety (ACRS) has released its 2017 ACRS Submission to Federal Parliamentarians - The way forward to reduce road trauma, outlining what it says is Australia’s stalled progress against National Road Safety Strategy 2011-2020 targets for death and injury reduction. According to ACRS, road trauma is one of the highest ranking public health issues Australia faces , with 1,300 deaths and 37,000 injuries per year, and rising. The causes and consequences of road trauma contin
  • January 30, 2012
    UK government to investigate best practice for travel information
    The UK Government has been advised by an internal inquiry that it should investigate examples of best practice in travel information services. So where might it look? Jon Masters reports. Publication of a UK Government report on road congestion this year has highlighted a need to look beyond home borders when searching out answers to pressing problems. With regard to issues of travel information in particular, UK transport professionals would do well to look overseas for solutions they can emulate.