DEPARTMENT FOR
TRANSPORT News Release (152 (TR-027)) issued by The Government News
Network on 8 November 2007
The Department for
Transport has today published National Statistics on Traffic in
Great Britain, including analyses by vehicle type and road class,
for the third quarter of 2007.
These provisional figures indicate that estimated traffic levels
rose by 1.1 per cent between Q3 2006 and Q3 2007. Other key
results, comparing the provisional Q3 2007 estimates with the
final estimates for the same quarter one year earlier (Q3 2006), include:
* Car traffic decreased by 1 per cent
* Light van traffic increased by 12 per cent
* Goods vehicle traffic increased by 3 per cent
* Traffic on minor urban roads and rural A roads rose by 6 per
cent and 1 per cent respectively
* Traffic on minor rural roads was virtually unchanged
* Traffic on motorways and urban A roads fell by 1 per cent and 3
per cent respectively
To put this into context, based on the 2006 final annual
estimates, cars account for 79 per cent of all motor vehicle
traffic, light vans (13 per cent), goods vehicles (6 per cent),
and other vehicles (2 per cent).
This quarterly bulletin also includes experimental statistics on
the PSA target used to monitor congestion on motorways and trunk
roads in England. Between the baseline year (August 2004 - July
2005) and the latest year (September 2006 - August 2007):
* Average vehicle delay on the slowest 10% of journeys rose from
3.78 to 4.16 minutes per 10 miles. The average journey time on
these journeys rose from 13.4 to 13.8 minutes per 10 miles.
NOTES TO EDITORS
1. The next quarterly bulletin will be published on 7 February 2008.
2. The figures on traffic levels are measured in terms of vehicle
kilometres and are sometimes known as the volume of traffic. This
is not the same as congestion. For example, traffic levels could
increase without increasing congestion if traffic is more evenly
spread during the day, with less during peak periods and more at
other times. Congestion has a number of consequences, such as
causing delays and making journey times unreliable.
3. The quarterly estimates are based mainly on data at 190 sites.
Caution should be taken in drawing conclusions about longer term
trends from a single quarter's or year's estimates.
4. The Department has a Public Service Agreement (PSA) target to
make journeys more reliable on the Strategic Road Network (SRN) in
England. This consists of all motorways and trunk roads managed by
the Highways Agency, as well as the M6 Toll. The PSA target will
be achieved if the average vehicle delay on the SRN's slowest
10% of journeys is less in 2007-08 than in the baseline period1.
Congestion for these purposes is defined as delay in minutes per
10 miles, compared with the time taken to travel at a given
'reference speed'. Currently, because of data quality
issues, 91 of 103 routes are used to monitor network performance.
More information can be found at http://www.dft.gov.uk/pgr/statistics/datatablespublications/roadstraffic/speedscongestion/congestiononthestrategicroad5359
5. These congestion data are 'experimental statistics'
that are under development and we are currently testing their
ability to meet customer needs. We believe they are robust enough
to give a reasonable indication of overall trends, but while the
series are experimental their quality cannot be assured to the
rigorous standards required by National Statistics.
6. Statistics Bulletin Traffic in Great Britain - 3rd Quarter
2007 is available at the following address: http://www.dft.gov.uk/transtat/roadtraff
Public Enquiries: 020 7944 8300
Department for Transport
Website: http://www.dft.gov.uk