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Road traffic statistics

99225

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A121
Road type Major
Start junction road B176
End junction road A10
Link length 0.80km (0.50 miles)
Easting & Northing 535316,200927
Latitude & longitude 51.6908,-0.04372

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 24,857 19,092 4,466 888 0 380 31
2023 Estimated using AADF from previous year on this link 24,167 18,283 4,830 799 64 189 66
2022 Estimated using AADF from previous year on this link 23,664 17,842 4,736 816 67 203 66
2021 Manual count 21,914 16,623 4,252 793 69 184 62
2020 Estimated using AADF from previous year on this link 16,051 11,884 3,019 977 2 147 24
2019 Estimated using AADF from previous year on this link 21,126 16,273 3,528 1,091 1 197 38
2018 Estimated using AADF from previous year on this link 21,082 16,237 3,539 1,084 1 183 38
2017 Manual count 20,986 16,315 3,380 1,063 1 188 40
2016 Estimated using AADF from previous year on this link 24,965 18,550 5,144 993 23 193 86
2015 Estimated using AADF from previous year on this link 24,326 18,322 4,763 961 24 193 87
2014 Estimated using AADF from previous year on this link 23,256 17,786 4,285 910 24 186 88
2013 Estimated using AADF from previous year on this link 22,564 17,385 3,992 927 30 181 79
2012 Estimated using AADF from previous year on this link 22,503 17,595 3,760 900 30 171 76
2011 Manual count 22,479 17,723 3,611 894 32 176 75
2010 Manual count 19,536 15,052 3,421 817 10 164 82
2009 Manual count 20,949 16,535 3,080 940 7 273 121
2008 Estimated using AADF from previous year on this link 24,170 18,219 4,469 1,065 14 314 103
2007 Estimated using AADF from previous year on this link 24,298 18,348 4,460 1,065 14 323 102
2006 Estimated using AADF from previous year on this link 23,959 18,477 4,025 1,029 14 321 107
2005 Estimated using AADF from previous year on this link 23,417 18,168 3,841 999 15 297 112
2004 Estimated using AADF from previous year on this link 23,387 18,297 3,672 993 14 309 116
2003 Estimated using AADF from previous year on this link 22,654 17,990 3,299 921 14 304 140
2002 Estimated using AADF from previous year on this link 21,881 17,603 2,980 876 17 280 142
2001 Manual count 21,321 17,107 2,956 846 16 275 137
2000 Manual count 22,459 18,405 2,538 877 13 516 123

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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 99225 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 99225 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. 192

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