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Road traffic statistics

9015

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A41
Road type Major
Start junction road M25 Junction 20
End junction road A414
Link length 5.00km (3.11 miles)
Easting & Northing 506058,202663
Latitude & longitude 51.71269,-0.46629

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 45,473 34,791 8,698 1,646 0 251 86
2023 Manual count 42,389 32,585 7,885 1,587 0 227 106
2022 Manual count 45,885 35,083 8,601 1,806 0 291 104
2021 Manual count 41,250 31,012 8,278 1,654 0 235 71
2020 Estimated using AADF from previous year on this link 33,409 25,550 5,604 1,895 0 276 83
2019 Manual count 44,155 34,988 6,547 2,119 0 371 130
2018 Estimated using AADF from previous year on this link 45,171 35,116 7,841 1,809 0 334 71
2017 Manual count 44,966 35,284 7,488 1,778 0 341 75
2016 Manual count 44,002 35,439 6,058 2,046 0 359 99
2015 Manual count 43,781 35,197 6,183 1,920 0 315 167
2014 Manual count 43,690 35,508 5,825 1,859 0 384 114
2013 Manual count 41,341 33,169 6,018 1,681 0 372 101
2012 Manual count 40,335 33,222 5,257 1,398 1 351 107
2011 Manual count 40,583 32,504 6,151 1,497 0 288 143
2010 Manual count 36,410 29,565 4,873 1,527 3 307 138
2009 Manual count 40,414 33,124 5,328 1,497 5 328 137
2008 Manual count 44,057 36,224 5,337 2,057 0 314 125
2007 Manual count 41,352 33,500 5,423 1,868 1 441 120
2006 Manual count 39,962 32,395 5,244 1,724 4 426 173
2005 Manual count 38,740 32,500 4,202 1,429 2 493 116
2004 Manual count 39,519 32,896 4,136 1,927 8 425 135
2003 Manual count 35,580 29,359 3,718 1,843 5 497 163
2002 Manual count 37,722 31,249 3,920 1,930 2 454 169
2001 Manual count 36,070 30,398 3,551 1,494 1 455 172
2000 Manual count 35,104 29,226 3,581 1,554 2 642 101

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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 9015 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 9015 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. 552

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