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Road traffic statistics

99428

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A121
Road type Major
Start junction road A1010
End junction road B176
Link length 0.60km (0.37 miles)
Easting & Northing 536068,200642
Latitude & longitude 51.68806,-0.03296

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 33,040 25,913 5,224 825 89 906 172
2023 Estimated using AADF from previous year on this link 33,871 25,986 6,246 904 124 462 273
2022 Estimated using AADF from previous year on this link 33,307 25,506 6,142 920 126 469 271
2021 Manual count 31,115 23,880 5,665 888 141 429 252
2020 Estimated using AADF from previous year on this link 22,735 17,524 3,909 919 321 205 178
2019 Estimated using AADF from previous year on this link 29,103 23,071 4,429 1,044 281 277 281
2018 Estimated using AADF from previous year on this link 28,866 22,785 4,468 1,038 256 296 278
2017 Manual count 29,058 23,039 4,386 1,027 231 299 307
2016 Estimated using AADF from previous year on this link 31,951 24,617 5,639 999 195 336 360
2015 Estimated using AADF from previous year on this link 31,119 24,239 5,163 986 210 343 388
2014 Estimated using AADF from previous year on this link 31,322 24,692 4,908 993 226 337 392
2013 Manual count 30,866 24,951 4,310 919 232 317 369
2012 Estimated using AADF from previous year on this link 28,765 22,282 5,037 726 113 295 424
2011 Estimated using AADF from previous year on this link 29,140 22,377 5,245 796 119 327 395
2010 Estimated using AADF from previous year on this link 29,065 22,489 5,087 786 108 308 395
2009 Estimated using AADF from previous year on this link 29,570 22,972 5,062 825 108 335 376
2008 Manual count 29,610 23,346 4,674 851 108 355 384
2007 Estimated using AADF from previous year on this link 33,764 26,177 5,523 1,129 129 601 334
2006 Estimated using AADF from previous year on this link 34,597 27,468 5,062 1,125 207 595 347
2005 Estimated using AADF from previous year on this link 34,391 27,386 4,983 1,097 133 572 353
2004 Estimated using AADF from previous year on this link 35,004 28,088 4,856 1,135 156 566 359
2003 Estimated using AADF from previous year on this link 35,073 28,032 4,901 1,111 193 643 386
2002 Estimated using AADF from previous year on this link 34,955 28,430 4,496 1,024 216 573 432
2001 Estimated using AADF from previous year on this link 35,010 28,487 4,487 1,046 207 567 423
2000 Manual count 34,450 27,929 4,505 1,054 216 547 415

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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 99428 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 99428 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. 144

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