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Road traffic statistics

8582

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A4178
Road type Major
Start junction road A4125
End junction road A4145 roundabout
Link length 1.20km (0.75 miles)
Easting & Northing 511000,195895
Latitude & longitude 51.6509,-0.39694

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 17,202 14,412 2,429 183 90 149 30
2023 Estimated using AADF from previous year on this link 16,939 14,197 2,386 182 89 144 30
2022 Estimated using AADF from previous year on this link 16,642 13,935 2,347 185 91 146 29
2021 Estimated using AADF from previous year on this link 15,550 13,046 2,165 178 101 134 27
2020 Estimated using AADF from previous year on this link 14,147 11,842 1,986 166 124 126 27
2019 Estimated using AADF from previous year on this link 18,242 15,590 2,250 190 109 171 42
2018 Manual count 18,080 15,397 2,270 190 99 182 42
2017 Estimated using AADF from previous year on this link 18,917 15,730 2,700 312 72 117 57
2016 Estimated using AADF from previous year on this link 18,901 15,847 2,565 312 75 116 61
2015 Estimated using AADF from previous year on this link 18,441 15,603 2,348 305 81 119 66
2014 Estimated using AADF from previous year on this link 18,054 15,300 2,239 319 87 135 61
2013 Estimated using AADF from previous year on this link 17,503 14,896 2,094 309 90 141 64
2012 Estimated using AADF from previous year on this link 17,533 15,029 2,015 303 91 126 61
2011 Manual count 17,744 15,267 1,991 298 96 132 56
2010 Estimated using AADF from previous year on this link 19,822 16,617 2,670 297 51 176 62
2009 Estimated using AADF from previous year on this link 20,187 16,974 2,657 306 51 191 59
2008 Estimated using AADF from previous year on this link 19,787 16,608 2,618 330 51 172 59
2007 Estimated using AADF from previous year on this link 20,012 16,930 2,501 338 45 184 59
2006 Manual count 20,643 17,765 2,292 343 72 182 61
2005 Estimated using AADF from previous year on this link 18,882 16,008 2,064 503 62 239 68
2004 Estimated using AADF from previous year on this link 19,256 16,419 2,011 521 73 236 69
2003 Estimated using AADF from previous year on this link 19,275 16,386 2,029 517 90 268 75
2002 Manual count 19,282 16,619 1,862 479 101 239 83
2001 Estimated using AADF from previous year on this link 23,117 19,843 2,459 475 113 238 102
2000 Estimated using AADF from previous year on this link 22,733 19,454 2,469 481 118 229 100

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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 8582 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 8582 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. 96

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