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Road traffic statistics

16012

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name M4
Road type Major
Start junction road LA Boundary
End junction road 4
Link length 2.70km (1.68 miles)
Easting & Northing 506000,178400
Latitude & longitude 51.49462,-0.47446

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 Manual count 158,643 127,744 22,873 6,509 0 666 851
2023 Manual count 152,573 124,266 18,596 8,085 0 856 769
2022 Manual count 149,022 121,285 18,570 7,833 0 787 546
2021 Estimated using AADF from previous year on this link 141,824 106,697 26,051 8,687 0 345 43
2020 Manual count 123,786 93,333 22,287 7,785 0 339 43
2019 Manual count 161,807 131,399 20,237 8,217 0 999 955
2018 Estimated using AADF from previous year on this link 153,593 124,934 19,838 6,600 0 1,233 988
2017 Manual count 153,935 126,009 19,229 6,472 0 1,240 984
2016 Estimated using AADF from previous year on this link 146,841 117,022 21,965 6,019 0 1,049 786
2015 Manual count 144,394 116,075 20,683 5,798 0 1,036 802
2014 Manual count 159,549 130,343 21,041 6,276 0 1,003 886
2013 Manual count 163,456 137,404 17,713 6,047 0 1,095 1,197
2012 Manual count 171,881 148,108 12,843 9,067 0 859 1,004
2011 Manual count 151,367 130,358 14,171 4,955 0 763 1,120
2010 Manual count 148,143 124,261 14,993 7,165 0 889 835
2009 Manual count 170,726 146,702 15,072 7,257 0 862 833
2008 Manual count 152,744 127,556 14,703 7,665 0 1,493 1,327
2007 Manual count 156,693 123,100 21,435 9,195 0 1,458 1,505
2006 Manual count 143,536 119,807 13,752 7,329 0 1,210 1,438
2005 Manual count 140,483 116,089 14,032 7,431 0 1,437 1,494
2004 Manual count 139,418 115,880 13,725 7,236 0 1,313 1,264
2003 Manual count 151,843 128,666 13,256 7,060 0 1,551 1,310
2002 Manual count 146,092 123,553 12,636 7,226 0 1,461 1,216
2001 Manual count 147,297 122,551 14,381 6,894 0 1,958 1,513
2000 Manual count 153,199 127,310 14,230 8,356 0 1,936 1,367

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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 16012 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 16012 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. 528

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