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Traffic Flow (State of the South West 2011)

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5.4.1 Figure 5.4.1 shows that the most significant growth has been on the region's motorways, which indicates an increase in middle and long distance journeys, but also continued use of the motorway network for more local trips. Interestingly however, data for 2009 shows a slight decrease in motorway traffic flow in the region, following year on year increases for every year from 2001 - 2008 (DfT Regional Transport Statistics, Table TRA7902). Traffic volume on A roads has remained stable as trips have increased on or transferred to motorways.

Figure 5.4.1 Traffic Volume (thousand vehicles)

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Traffic Volumes (Thousand Vehicles) (Fig 5.4.1)
Traffic Volumes (Thousand Vehicles) (Fig 5.4.1). Source: Dft Regional Transport Statistics.
5.4.2 According to a report by the Highways Agency, several strategic road corridors experience considerable delays throughout the day. Whereas delays of around 15-30 and 30-45 daily seconds are experienced on most of the
stressed sections, particular sections on the A30, A31, A35, A38, A303, A417 and the M5 are significantly more congested resulting in daily delays per vehicle of 60 seconds or longer. Although some parts of the strategic road network are relatively uncongested, a considerable number of corridors experience congestion during the morning and evening peak. A growing number of corridors experience high levels of stress for substantial parts of the
day.