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Road traffic statistics

16112

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name A4
Road type Major
Start junction road A408
End junction road A437
Link length 1.10km (0.68 miles)
Easting & Northing 508000,176940
Latitude & longitude 51.48112,-0.44611

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 16,143 12,492 1,639 375 124 254 1,382
2023 Estimated using AADF from previous year on this link 16,187 12,566 1,630 379 111 243 1,369
2022 Estimated using AADF from previous year on this link 16,180 12,592 1,602 389 108 240 1,358
2021 Estimated using AADF from previous year on this link 15,658 12,259 1,475 374 106 208 1,341
2020 Estimated using AADF from previous year on this link 14,608 11,363 1,384 349 118 182 1,330
2019 Estimated using AADF from previous year on this link 18,819 14,990 1,587 406 96 239 1,595
2018 Estimated using AADF from previous year on this link 18,775 14,951 1,588 404 102 227 1,605
2017 Manual count 18,842 14,964 1,556 428 103 225 1,668
2016 Estimated using AADF from previous year on this link 19,175 15,384 1,376 474 132 210 1,731
2015 Estimated using AADF from previous year on this link 19,344 15,708 1,334 469 127 195 1,637
2014 Estimated using AADF from previous year on this link 19,429 15,761 1,283 471 111 206 1,708
2013 Manual count 19,442 15,716 1,241 506 99 199 1,780
2012 Estimated using AADF from previous year on this link 21,194 17,682 1,485 419 19 335 1,273
2011 Manual count 21,532 18,026 1,521 385 22 308 1,292
2010 Estimated using AADF from previous year on this link 36,280 31,063 2,664 944 0 242 1,367
2009 Manual count 37,092 31,925 2,693 930 0 258 1,286
2008 Estimated using AADF from previous year on this link 27,647 23,336 1,875 797 108 284 1,355
2007 Estimated using AADF from previous year on this link 28,242 23,885 1,915 819 92 291 1,332
2006 Estimated using AADF from previous year on this link 28,477 24,249 1,874 731 71 297 1,326
2005 Manual count 27,984 23,812 1,890 744 58 273 1,265
2004 Estimated using AADF from previous year on this link 30,642 25,853 2,171 746 66 215 1,657
2003 Estimated using AADF from previous year on this link 30,204 25,547 2,292 689 76 225 1,451
2002 Manual count 30,361 26,068 2,082 735 52 217 1,259
2001 Estimated using AADF from previous year on this link 35,491 30,656 2,344 625 66 355 1,511
2000 Estimated using AADF from previous year on this link 35,333 30,625 2,337 630 60 329 1,412

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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 16112 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 16112 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. 144

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