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Road traffic statistics

28118

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name A4020
Road type Major
Start junction road A437
End junction road A437
Link length 0.30km (0.19 miles)
Easting & Northing 507278,182763
Latitude & longitude 51.53359,-0.45473

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 20,680 17,109 2,651 241 238 225 455
2023 Estimated using AADF from previous year on this link 20,754 17,209 2,636 243 213 215 450
2022 Estimated using AADF from previous year on this link 20,742 17,245 2,590 247 207 212 447
2021 Estimated using AADF from previous year on this link 20,035 16,790 2,386 234 202 184 441
2020 Estimated using AADF from previous year on this link 18,619 15,563 2,238 220 227 161 438
2019 Estimated using AADF from previous year on this link 24,087 20,530 2,567 254 183 212 525
2018 Manual count 24,027 20,476 2,568 254 195 201 528
2017 Estimated using AADF from previous year on this link 21,170 18,035 2,127 314 343 161 534
2016 Estimated using AADF from previous year on this link 21,219 18,041 2,145 323 351 155 556
2015 Estimated using AADF from previous year on this link 21,484 18,421 2,079 313 340 145 526
2014 Manual count 21,495 18,484 1,998 312 296 153 549
2013 Estimated using AADF from previous year on this link 44,872 37,076 5,995 1,005 244 350 446
2012 Manual count 44,414 36,756 5,848 968 298 358 483
2011 Estimated using AADF from previous year on this link 36,275 32,442 2,078 930 72 241 584
2010 Manual count 36,314 32,540 2,088 877 72 243 566
2009 Estimated using AADF from previous year on this link 28,341 23,964 2,407 875 405 375 720
2008 Estimated using AADF from previous year on this link 28,633 24,157 2,472 925 373 397 682
2007 Estimated using AADF from previous year on this link 29,270 24,725 2,525 942 318 408 670
2006 Estimated using AADF from previous year on this link 29,497 25,102 2,471 841 246 415 668
2005 Estimated using AADF from previous year on this link 29,009 24,650 2,492 849 199 382 636
2004 Estimated using AADF from previous year on this link 29,273 24,924 2,441 897 195 415 596
2003 Manual count 28,971 24,628 2,577 809 226 435 522
2002 Estimated using AADF from previous year on this link 28,426 24,689 2,560 367 207 146 664
2001 Estimated using AADF from previous year on this link 28,354 24,689 2,510 395 199 152 608
2000 Estimated using AADF from previous year on this link 28,284 24,664 2,502 410 181 140 568

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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 28118 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 28118 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. 120

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