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Road traffic statistics

56742

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name A408
Road type Major
Start junction road M4
End junction road A4020
Link length 7.80km (4.85 miles)
Easting & Northing 507000,181070
Latitude & longitude 51.51843,-0.45925

Location

Contents

Average Annual Daily Flow

Average annual daily flow
Year Count method All motor vehicles Cars & taxis LGVs HGVs Pedal cycles Motorcycles Buses & coaches
2024 Estimated using AADF from previous year on this link 15,708 12,843 2,278 319 121 105 163
2023 Estimated using AADF from previous year on this link 15,766 12,919 2,265 320 108 101 161
2022 Estimated using AADF from previous year on this link 15,756 12,946 2,225 325 106 99 160
2021 Estimated using AADF from previous year on this link 15,206 12,604 2,050 308 103 86 158
2020 Estimated using AADF from previous year on this link 14,127 11,683 1,923 289 115 75 157
2019 Estimated using AADF from previous year on this link 18,237 15,412 2,206 333 93 99 188
2018 Manual count 18,195 15,371 2,207 334 100 94 189
2017 Estimated using AADF from previous year on this link 14,598 11,313 2,270 434 49 171 410
2016 Estimated using AADF from previous year on this link 14,639 11,317 2,289 441 50 165 427
2015 Estimated using AADF from previous year on this link 14,766 11,555 2,219 434 48 154 404
2014 Estimated using AADF from previous year on this link 14,739 11,594 2,133 428 42 163 421
2013 Estimated using AADF from previous year on this link 14,676 11,561 2,063 456 38 157 439
2012 Estimated using AADF from previous year on this link 14,548 11,461 2,012 437 46 161 476
2011 Estimated using AADF from previous year on this link 14,781 11,684 2,061 405 53 148 483
2010 Estimated using AADF from previous year on this link 14,802 11,719 2,071 396 53 148 468
2009 Estimated using AADF from previous year on this link 15,129 12,045 2,094 391 55 158 441
2008 Manual count 15,288 12,143 2,150 409 51 168 418
2007 Manual count 19,468 15,720 2,760 405 27 195 388
2006 Manual count 19,182 15,132 3,266 449 183 164 171
2005 Manual count 20,195 17,351 1,677 771 98 138 258
2004 Manual count 20,679 17,169 2,330 725 68 198 257
2003 Manual count 20,140 16,129 2,903 780 21 134 194
2002 Manual count 20,462 17,703 1,758 697 133 127 177
2001 Manual count 20,776 17,176 2,698 603 44 134 165
2000 Manual count 26,563 22,787 2,577 619 19 260 320

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Data disclaimer

Traffic figures at the regional and national level are robust, and are reported as accredited official statistics. However, DfT’s traffic estimates for individual road links and small areas are less robust, as they are not always based on up-to-date counts made at these locations. Where other more up-to-date sources of traffic data are available (e.g. from local highways authorities), this may provide a more accurate estimate of traffic at these locations.

It is the responsibility of the user to decide which data are most appropriate for their purpose, and if DfT road link level traffic estimates are used, to make a note of the limitations in any published material.

Quality flags in data downloads

DfT’s road link level traffic estimates are calculated using a variety of methods, with some methods likely to produce more accurate estimates than others.

The data tables available to download here contain a column - estimation_method – showing the method used to estimate traffic for each location and year. Figures having an estimation method of “Counted” are likely to be more accurate than those marked as “Estimated”, and the latter should be used with caution.

Site details
Manual count point site 56742 details
Average annual daily flow
Number of vehicles that travel past the count point (in both directions) on an average day of the year.
Average annual daily flow by direction
Number of vehicles that travel past the count point on an average day of the year, by direction of travel.
Raw counts
Vehicle counts recorded at this count point.
Data Description Records Download
Site details Manual count point site 56742 details 1
Average annual daily flow Number of vehicles that travel past the count point (in both directions) on an average day of the year. 25
Average annual daily flow by direction Number of vehicles that travel past the count point on an average day of the year, by direction of travel. 50
Raw counts Vehicle counts recorded at this count point. 240

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