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Road traffic statistics

Roadside traffic counts of Heavy Goods Vehicles are changing from 2028, your feedback will help us improve this.

27081

Details

AADF latest year 2025
Region London
Local authority Harrow
Road name A404
Road type Major
Start junction road A4090
End junction road A4005
Link length 0.9 miles
Easting & Northing 514000,188480
Latitude & Longitude 51.58366,-0.35601

Location

Streetview shows approximate location only - this panorama may be on a different road to the count point. Current panorama is less than 10 meters from this count point.

Annual Average Daily Flow

Year Count method All motor vehicles Cars & taxis LGVs HGVs Pedal cycles Motorcycles Buses & coaches
2025 Estimated using AADF from previous year on this link 13,873 11,477 1,145 234 128 544 474
2024 Estimated using AADF from previous year on this link 13,992 11,602 1,143 236 118 543 469
2023 Manual count 14,028 11,671 1,136 238 106 519 464
2022 Estimated using AADF from previous year on this link 13,091 10,998 1,255 303 190 149 387
2021 Estimated using AADF from previous year on this link 12,660 10,708 1,156 285 186 129 382
2020 Estimated using AADF from previous year on this link 11,771 9,925 1,084 269 208 113 379
2019 Estimated using AADF from previous year on this link 15,248 13,093 1,243 308 168 148 455
2018 Estimated using AADF from previous year on this link 15,212 13,059 1,244 311 179 141 458
2017 Estimated using AADF from previous year on this link 15,219 13,071 1,219 315 182 140 476
2016 Estimated using AADF from previous year on this link 15,255 13,075 1,229 321 186 135 496
2015 Manual count 15,455 13,350 1,192 319 180 125 469
2014 Estimated using AADF from previous year on this link 15,619 12,726 1,710 463 94 184 536
2013 Estimated using AADF from previous year on this link 15,578 12,689 1,655 499 84 177 558
2012 Estimated using AADF from previous year on this link 15,465 12,579 1,614 485 102 182 605
2011 Estimated using AADF from previous year on this link 15,712 12,824 1,653 454 118 167 614
2010 Estimated using AADF from previous year on this link 15,736 12,863 1,661 450 118 167 595
2009 Estimated using AADF from previous year on this link 16,082 13,220 1,680 444 122 178 560
2008 Estimated using AADF from previous year on this link 16,249 13,327 1,725 477 112 189 531
2007 Estimated using AADF from previous year on this link 16,611 13,641 1,762 492 95 194 522
2006 Manual count 16,731 13,849 1,724 440 75 198 520
2005 Estimated using AADF from previous year on this link 17,148 14,857 1,500 282 125 100 409
2004 Estimated using AADF from previous year on this link 17,281 15,022 1,470 297 123 108 384
2003 Estimated using AADF from previous year on this link 17,113 14,844 1,552 268 143 113 336
2002 Manual count 17,249 15,147 1,409 292 98 110 291
2001 Estimated using AADF from previous year on this link 17,349 15,148 1,367 369 140 194 271
2000 Manual count 17,316 15,133 1,363 387 127 180 253

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.

Metadata

The road traffic statistics metadata PDF document provides guidance on the different datasets available to download for DfT traffic estimates.

Downloads

Site details
Manual count point site 27081 details
Annual average daily flow
Number of vehicles that travel past the count point (in both directions) on an average day of the year.
Annual average 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 27081 details 1
Annual average daily flow Number of vehicles that travel past the count point (in both directions) on an average day of the year. 26
Annual average daily flow by direction Number of vehicles that travel past the count point on an average day of the year, by direction of travel. 52
Raw counts Vehicle counts recorded at this count point. 120

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