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Road traffic statistics

57111

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A405
Road type Major
Start junction road A412
End junction road M1
Link length 1.30km (0.81 miles)
Easting & Northing 511711,200736
Latitude & longitude 51.69427,-0.38512

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 27,937 23,103 3,664 821 229 171 178
2023 Estimated using AADF from previous year on this link 27,601 22,828 3,600 822 239 173 178
2022 Manual count 27,011 22,276 3,530 838 252 186 180
2021 Estimated using AADF from previous year on this link 22,708 17,659 4,162 554 70 113 219
2020 Manual count 20,592 16,148 3,635 515 94 110 185
2019 Estimated using AADF from previous year on this link 26,134 21,924 3,143 643 107 211 213
2018 Estimated using AADF from previous year on this link 26,079 21,876 3,153 638 89 196 216
2017 Manual count 26,044 21,980 3,011 624 91 201 227
2016 Estimated using AADF from previous year on this link 31,194 25,826 3,972 835 102 236 323
2015 Manual count 30,563 25,509 3,678 811 102 236 328
2014 Estimated using AADF from previous year on this link 32,447 27,460 3,429 948 122 233 377
2013 Manual count 31,559 26,842 3,195 961 153 226 336
2012 Estimated using AADF from previous year on this link 31,121 25,791 3,720 984 136 276 350
2011 Manual count 31,145 25,978 3,572 966 146 284 345
2010 Manual count 28,596 23,900 3,317 914 137 142 323
2009 Manual count 30,698 25,924 3,162 1,058 156 247 307
2008 Estimated using AADF from previous year on this link 31,666 25,602 4,460 1,119 174 292 193
2007 Estimated using AADF from previous year on this link 31,845 25,782 4,451 1,119 172 302 191
2006 Estimated using AADF from previous year on this link 31,580 25,964 4,016 1,098 171 300 202
2005 Estimated using AADF from previous year on this link 30,918 25,530 3,833 1,069 178 276 210
2004 Estimated using AADF from previous year on this link 30,948 25,709 3,665 1,067 171 288 219
2003 Estimated using AADF from previous year on this link 30,124 25,280 3,292 1,005 175 283 264
2002 Estimated using AADF from previous year on this link 29,204 24,736 2,974 966 209 261 267
2001 Manual count 28,444 24,038 2,950 942 195 256 258
2000 Estimated using AADF from previous year on this link 31,740 26,611 3,141 1,390 32 248 350

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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 57111 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 57111 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. 216

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