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Road traffic statistics

27084

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A405
Road type Major
Start junction road M25
End junction road Tippendell Lane, St Albans
Link length 2.00km (1.24 miles)
Easting & Northing 513206,203721
Latitude & longitude 51.7208,-0.36253

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 28,537 22,071 4,916 1,333 6 184 33
2023 Estimated using AADF from previous year on this link 29,499 23,587 4,224 1,485 17 164 39
2022 Manual count 28,915 23,018 4,142 1,540 18 176 39
2021 Estimated using AADF from previous year on this link 22,899 17,764 3,483 1,472 22 151 30
2020 Estimated using AADF from previous year on this link 20,829 16,244 3,042 1,372 30 146 25
2019 Manual count 27,566 22,244 3,554 1,533 23 196 39
2018 Estimated using AADF from previous year on this link 28,894 22,371 4,626 1,574 19 295 30
2017 Manual count 28,773 22,478 4,417 1,545 19 301 31
2016 Estimated using AADF from previous year on this link 28,706 22,410 4,318 1,618 14 274 86
2015 Estimated using AADF from previous year on this link 28,069 22,135 3,998 1,574 14 273 88
2014 Manual count 26,924 21,488 3,597 1,486 14 265 89
2013 Estimated using AADF from previous year on this link 26,945 20,994 3,904 1,692 33 278 78
2012 Manual count 26,912 21,248 3,677 1,649 34 263 75
2011 Estimated using AADF from previous year on this link 26,834 21,143 3,540 1,819 18 291 41
2010 Manual count 26,907 21,271 3,460 1,840 21 295 41
2009 Manual count 25,491 20,525 2,814 1,674 22 350 128
2008 Manual count 28,569 22,516 3,785 1,861 35 320 87
2007 Estimated using AADF from previous year on this link 25,640 20,303 2,909 1,973 11 328 127
2006 Estimated using AADF from previous year on this link 25,480 20,445 2,626 1,949 10 326 134
2005 Estimated using AADF from previous year on this link 24,981 20,104 2,506 1,930 11 301 140
2004 Manual count 25,059 20,245 2,395 1,961 10 313 145
2003 Estimated using AADF from previous year on this link 27,079 21,516 2,782 2,332 13 359 90
2002 Manual count 26,256 21,053 2,513 2,268 15 331 91
2001 Estimated using AADF from previous year on this link 25,800 20,489 2,975 1,895 18 344 97
2000 Manual count 24,996 19,873 2,817 1,900 20 312 94

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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 27084 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 27084 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. 288

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