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Road traffic statistics

18397

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A4178
Road type Major
Start junction road A411
End junction road A412
Link length 0.20km (0.12 miles)
Easting & Northing 510530,196580
Latitude & longitude 51.65715,-0.40351

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 14,646 12,252 2,019 146 69 174 54
2023 Estimated using AADF from previous year on this link 14,422 12,069 1,984 146 68 169 53
2022 Estimated using AADF from previous year on this link 14,170 11,847 1,951 148 69 172 53
2021 Estimated using AADF from previous year on this link 13,240 11,091 1,799 143 77 157 49
2020 Manual count 12,047 10,067 1,651 133 94 148 48
2019 Estimated using AADF from previous year on this link 14,761 12,343 2,018 226 67 107 68
2018 Estimated using AADF from previous year on this link 14,633 12,190 2,036 226 61 114 67
2017 Estimated using AADF from previous year on this link 14,738 12,326 1,999 225 55 116 74
2016 Estimated using AADF from previous year on this link 14,733 12,417 1,898 224 58 114 79
2015 Estimated using AADF from previous year on this link 14,387 12,226 1,738 221 62 117 85
2014 Estimated using AADF from previous year on this link 14,086 11,989 1,657 228 67 133 79
2013 Estimated using AADF from previous year on this link 13,667 11,672 1,550 224 69 139 82
2012 Manual count 13,693 11,776 1,491 223 70 124 79
2011 Estimated using AADF from previous year on this link 12,874 10,927 1,579 258 72 76 34
2010 Estimated using AADF from previous year on this link 12,753 10,960 1,415 252 65 90 36
2009 Estimated using AADF from previous year on this link 12,717 11,026 1,325 240 65 94 32
2008 Estimated using AADF from previous year on this link 12,470 10,789 1,305 260 65 84 32
2007 Estimated using AADF from previous year on this link 12,693 11,032 1,279 258 58 88 36
2006 Estimated using AADF from previous year on this link 12,831 11,212 1,214 275 92 91 39
2005 Estimated using AADF from previous year on this link 13,063 11,429 1,197 288 59 106 43
2004 Manual count 13,543 11,980 1,123 267 70 128 45
2003 Estimated using AADF from previous year on this link 13,501 11,580 1,503 125 66 200 93
2002 Estimated using AADF from previous year on this link 13,774 12,025 1,384 128 73 141 96
2001 Estimated using AADF from previous year on this link 13,492 11,836 1,291 133 70 136 96
2000 Estimated using AADF from previous year on this link 13,856 12,215 1,282 138 73 130 91

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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 18397 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 18397 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. 72

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