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Road traffic statistics

78403

Details

AADF latest year 2024
Region London
Local authority Hillingdon
Road name A4020
Road type Major
Start junction road LA Boundary
End junction road B467 Harefield Rd
Link length 0.50km (0.31 miles)
Easting & Northing 505260,184500
Latitude & longitude 51.54958,-0.48329

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 from nearby links 19,046 15,167 3,062 518 83 156 142
2023 Estimated from nearby links 19,002 15,132 3,047 527 82 153 143
2022 Estimated from nearby links 19,549 15,543 3,134 560 84 162 149
2021 Estimated from nearby links 17,681 14,083 2,797 523 94 144 134
2020 Estimated from nearby links 16,174 12,839 2,578 490 115 136 130
2019 Estimated from nearby links 20,651 16,804 2,904 555 100 183 205
2018 Estimated from nearby links 20,866 16,909 2,986 565 93 199 206
2017 Estimated from nearby links 21,049 17,124 2,935 560 82 202 228
2016 Estimated from nearby links 23,562 19,309 3,128 629 96 225 271
2015 Estimated from nearby links 24,244 18,901 3,937 782 100 301 322
2014 Estimated from nearby links 23,244 18,348 3,542 735 100 292 327
2013 Estimated from nearby links 22,557 17,934 3,300 748 126 283 291
2012 Estimated from nearby links 22,536 18,151 3,108 727 127 268 282
2011 Estimated from nearby links 22,547 18,283 2,986 725 136 275 278
2010 Estimated from nearby links 21,437 17,585 2,828 570 136 218 236
2009 Estimated from nearby links 22,633 18,892 2,678 601 59 184 278
2008 Estimated from nearby links 22,928 18,932 2,856 664 92 215 261
2007 Estimated from nearby links 25,670 21,040 3,184 945 139 226 275
2006 Estimated from nearby links 25,507 21,188 2,873 931 137 224 291
2005 Estimated from nearby links 24,999 20,834 2,742 913 144 207 303
2004 Estimated from nearby links 25,051 20,981 2,621 918 137 216 315
2003 Estimated from nearby links 24,118 20,025 2,855 775 48 275 188
2002 Estimated from nearby links 23,353 19,594 2,579 735 57 254 191
2001 Estimated from nearby links 22,739 19,042 2,559 706 54 248 184
2000 Estimated from nearby links 24,953 20,152 3,201 946 58 344 310

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 78403 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 78403 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. 25
Raw counts Vehicle counts recorded at this count point. 0

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