Skip to main content
Road traffic statistics

28874

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name A4020
Road type Major
Start junction road A312
End junction road LA Boundary
Link length 1.00km (0.62 miles)
Easting & Northing 511478,180722
Latitude & longitude 51.51443,-0.39485

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 26,817 21,833 3,377 416 326 437 754
2023 Automatic counter 26,874 21,936 3,356 419 291 417 746
2022 Automatic counter 26,420 21,624 3,242 423 284 404 728
2021 Automatic counter 25,113 20,723 2,938 399 277 345 707
2020 Automatic counter 24,215 19,927 2,858 388 311 314 728
2019 Automatic counter 27,102 22,761 2,840 388 251 357 756
2018 Manual count 29,277 24,589 3,078 421 290 366 824
2017 Automatic counter 27,145 19,595 3,333 2,036 963 605 1,575
2016 Estimated using AADF from previous year on this link 23,456 16,797 2,978 1,792 838 498 1,392
2015 Estimated using AADF from previous year on this link 23,468 17,151 2,887 1,649 810 464 1,317
2014 Estimated using AADF from previous year on this link 23,508 17,209 2,775 1,662 706 490 1,374
2013 Manual count 23,465 17,159 2,684 1,717 629 473 1,432
2012 Estimated using AADF from previous year on this link 29,132 24,057 2,619 1,031 163 263 1,162
2011 Estimated using AADF from previous year on this link 29,585 24,525 2,682 957 188 242 1,179
2010 Estimated using AADF from previous year on this link 29,621 24,599 2,696 941 189 243 1,142
2009 Estimated using AADF from previous year on this link 30,278 25,282 2,725 939 195 258 1,074
2008 Manual count 30,591 25,486 2,798 1,016 180 273 1,018
2007 Manual count 26,900 22,825 2,494 613 125 201 767
2006 Manual count 29,159 24,196 3,153 696 275 294 820
2005 Manual count 32,080 27,500 2,452 1,206 210 178 744
2004 Manual count 37,930 32,342 3,469 1,153 316 236 730
2003 Manual count 36,107 29,468 4,422 1,132 144 228 857
2002 Estimated using AADF from previous year on this link 32,395 27,951 2,658 742 365 340 704
2001 Manual count 32,357 27,951 2,606 800 351 355 645
2000 Estimated using AADF from previous year on this link 37,419 31,007 5,202 632 56 192 386

Download data

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 28874 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 28874 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. 216

To apply more filters to downloads, or retrieve data split into pages you can use our API.