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Road traffic statistics

56944

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name A4020
Road type Major
Start junction road A408/Oxford Road roundabout
End junction road A437
Link length 2.60km (1.62 miles)
Easting & Northing 506040,183500
Latitude & longitude 51.54045,-0.47235

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 Automatic counter 29,780 24,313 3,017 765 182 680 1,006
2023 Automatic counter 29,640 24,264 2,976 766 163 645 988
2022 Manual count 33,435 27,439 3,304 876 159 714 1,103
2021 Estimated using AADF from previous year on this link 30,800 25,620 3,257 475 220 306 1,143
2020 Estimated using AADF from previous year on this link 28,647 23,748 3,055 444 247 268 1,133
2019 Estimated using AADF from previous year on this link 37,057 31,327 3,504 515 199 352 1,359
2018 Manual count 36,965 31,246 3,505 513 213 334 1,368
2017 Automatic counter 32,018 27,166 2,986 591 234 337 939
2016 Estimated using AADF from previous year on this link 38,680 32,725 3,626 760 287 392 1,178
2015 Manual count 39,083 33,415 3,516 673 278 365 1,113
2014 Estimated using AADF from previous year on this link 42,116 37,430 2,859 507 107 336 984
2013 Manual count 41,979 37,322 2,766 541 96 325 1,026
2012 Estimated using AADF from previous year on this link 33,588 29,240 2,504 408 86 237 1,198
2011 Estimated using AADF from previous year on this link 34,189 29,809 2,564 382 100 218 1,216
2010 Estimated using AADF from previous year on this link 34,251 29,899 2,577 378 100 219 1,178
2009 Estimated using AADF from previous year on this link 35,049 30,729 2,606 373 103 233 1,108
2008 Manual count 35,347 30,976 2,675 399 95 247 1,050
2007 Manual count 33,909 29,337 2,400 603 120 237 1,332
2006 Manual count 40,661 34,383 3,890 709 283 383 1,296
2005 Manual count 41,140 36,573 2,096 1,000 133 289 1,182
2004 Manual count 41,346 36,286 2,580 792 94 276 1,412
2003 Manual count 41,399 36,548 2,544 1,012 167 299 996
2002 Manual count 44,625 40,375 2,163 628 160 292 1,167
2001 Manual count 41,151 36,008 3,243 672 91 286 942
2000 Manual count 40,976 36,530 2,369 1,095 127 171 811

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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 56944 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 56944 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. 312

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