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Road traffic statistics

47713

Details

AADF latest year 2024
Region London
Local authority Harrow
Road name A4140
Road type Major
Start junction road LA Boundary
End junction road A410
Link length 4.10km (2.55 miles)
Easting & Northing 518200,190000
Latitude & longitude 51.59646,-0.2949

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 23,512 18,735 3,657 557 107 378 184
2023 Estimated using AADF from previous year on this link 23,587 18,846 3,636 561 96 361 182
2022 Estimated using AADF from previous year on this link 23,565 18,885 3,573 570 94 356 181
2021 Manual count 22,705 18,386 3,291 540 91 309 179
2020 Estimated using AADF from previous year on this link 17,095 14,115 2,250 380 78 133 217
2019 Estimated using AADF from previous year on this link 22,072 18,620 2,582 436 63 174 260
2018 Estimated using AADF from previous year on this link 22,019 18,571 2,583 438 67 165 262
2017 Manual count 22,004 18,588 2,531 450 68 164 272
2016 Estimated using AADF from previous year on this link 30,045 26,099 2,526 876 85 262 282
2015 Estimated using AADF from previous year on this link 30,393 26,649 2,449 784 82 244 266
2014 Estimated using AADF from previous year on this link 30,418 26,739 2,354 790 72 258 278
2013 Estimated using AADF from previous year on this link 30,305 26,662 2,277 827 64 249 289
2012 Manual count 30,002 26,432 2,221 780 78 255 314
2011 Estimated using AADF from previous year on this link 23,531 20,674 1,756 792 74 76 233
2010 Estimated using AADF from previous year on this link 23,579 20,736 1,764 777 74 76 226
2009 Estimated using AADF from previous year on this link 24,159 21,312 1,784 770 77 80 213
2008 Manual count 24,420 21,483 1,832 819 71 84 202
2007 Manual count 19,191 15,753 2,370 606 14 111 351
2006 Manual count 24,284 20,289 2,811 614 38 226 344
2005 Estimated using AADF from previous year on this link 28,300 25,101 2,267 466 44 158 308
2004 Manual count 28,542 25,380 2,220 481 43 172 289
2003 Manual count 28,025 24,622 2,461 570 26 144 228
2002 Manual count 27,674 24,282 2,333 545 18 175 339
2001 Manual count 26,349 22,862 2,383 666 18 163 275
2000 Manual count 26,585 23,444 2,037 661 32 140 303

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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 47713 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 47713 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. 264

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