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Road traffic statistics

17620

Details

AADF latest year 2024
Region London
Local authority Harrow
Road name A4140
Road type Major
Start junction road A410
End junction road LA Boundary
Link length 2.30km (1.43 miles)
Easting & Northing 516000,193430
Latitude & longitude 51.62774,-0.32552

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 9,966 8,922 646 78 41 132 187
2023 Manual count 10,008 8,975 642 78 37 127 185
2022 Estimated using AADF from previous year on this link 8,069 7,179 603 88 62 65 134
2021 Estimated using AADF from previous year on this link 7,817 6,989 555 83 61 57 132
2020 Estimated using AADF from previous year on this link 7,259 6,478 521 78 68 50 131
2019 Estimated using AADF from previous year on this link 9,456 8,546 597 90 55 65 157
2018 Estimated using AADF from previous year on this link 9,432 8,524 598 90 59 62 158
2017 Estimated using AADF from previous year on this link 9,435 8,531 586 92 59 61 165
2016 Estimated using AADF from previous year on this link 9,451 8,534 591 96 61 59 171
2015 Manual count 9,597 8,714 573 93 59 55 162
2014 Estimated using AADF from previous year on this link 11,783 10,296 1,048 181 25 43 215
2013 Estimated using AADF from previous year on this link 11,738 10,267 1,014 191 22 41 225
2012 Estimated using AADF from previous year on this link 11,633 10,178 989 180 27 42 243
2011 Estimated using AADF from previous year on this link 11,838 10,376 1,013 163 31 39 247
2010 Estimated using AADF from previous year on this link 11,860 10,407 1,018 157 31 39 239
2009 Estimated using AADF from previous year on this link 12,151 10,696 1,029 160 32 41 225
2008 Estimated using AADF from previous year on this link 12,263 10,782 1,057 168 30 43 213
2007 Estimated using AADF from previous year on this link 12,539 11,037 1,080 169 26 44 209
2006 Manual count 12,661 11,204 1,057 146 20 45 209
2005 Estimated using AADF from previous year on this link 10,940 9,945 679 69 31 43 204
2004 Estimated using AADF from previous year on this link 11,031 10,056 665 71 30 48 191
2003 Estimated using AADF from previous year on this link 10,923 9,937 702 67 35 50 167
2002 Manual count 11,043 10,140 638 72 24 48 145
2001 Estimated using AADF from previous year on this link 12,451 11,113 212 929 35 109 88
2000 Estimated using AADF from previous year on this link 12,446 11,102 212 950 32 100 82

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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 17620 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 17620 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. 96

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