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Road traffic statistics

78212

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A4251
Road type Major
Start junction road Nash Mills Lane, Hemel Hempstead
End junction road Home Park Mill Link Rd, Kings Langley
Link length 2.50km (1.55 miles)
Easting & Northing 507290,202429
Latitude & longitude 51.71035,-0.44854

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 13,157 11,040 1,802 151 48 75 88
2023 Estimated using AADF from previous year on this link 13,467 11,170 1,985 187 58 77 47
2022 Estimated using AADF from previous year on this link 13,231 10,964 1,952 190 59 79 47
2021 Estimated using AADF from previous year on this link 12,364 10,265 1,801 183 66 72 43
2020 Estimated using AADF from previous year on this link 11,250 9,318 1,652 171 80 68 42
2019 Estimated using AADF from previous year on this link 14,491 12,267 1,872 194 70 92 66
2018 Estimated using AADF from previous year on this link 14,362 12,115 1,888 195 64 98 66
2017 Estimated using AADF from previous year on this link 14,468 12,250 1,854 194 58 99 72
2016 Manual count 14,470 12,341 1,761 193 60 98 78
2015 Estimated using AADF from previous year on this link 14,614 11,725 2,458 276 27 57 99
2014 Estimated using AADF from previous year on this link 14,284 11,497 2,344 287 29 64 92
2013 Estimated using AADF from previous year on this link 13,825 11,193 2,192 277 30 67 95
2012 Estimated using AADF from previous year on this link 13,824 11,293 2,109 270 30 60 91
2011 Estimated using AADF from previous year on this link 13,969 11,472 2,084 266 32 63 84
2010 Estimated using AADF from previous year on this link 13,796 11,506 1,868 259 29 74 89
2009 Estimated using AADF from previous year on this link 13,733 11,576 1,749 251 29 78 79
2008 Estimated using AADF from previous year on this link 13,470 11,326 1,723 272 29 70 79
2007 Manual count 13,705 11,580 1,687 274 26 74 90
2006 Estimated using AADF from previous year on this link 12,569 10,017 1,774 620 96 76 82
2005 Estimated using AADF from previous year on this link 12,783 10,211 1,748 648 61 88 88
2004 Estimated using AADF from previous year on this link 13,155 10,703 1,640 612 72 107 93
2003 Manual count 12,843 10,566 1,489 511 90 163 114
2002 Manual count 13,664 11,664 1,381 424 23 72 123
2001 Estimated using AADF from previous year on this link 13,408 11,480 1,288 447 22 70 123
2000 Estimated using AADF from previous year on this link 13,785 11,848 1,279 474 23 67 117

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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 78212 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 78212 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. 120

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