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Road traffic statistics

17027

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A411
Road type Major
Start junction road Courtlands Drive
End junction road A412
Link length 2.70km (1.68 miles)
Easting & Northing 510000,197600
Latitude & longitude 51.66643,-0.41085

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 17,719 14,978 2,282 229 116 98 131
2023 Estimated using AADF from previous year on this link 17,451 14,755 2,242 229 115 95 131
2022 Estimated using AADF from previous year on this link 17,145 14,482 2,204 232 117 96 129
2021 Estimated using AADF from previous year on this link 16,025 13,559 2,033 224 131 88 120
2020 Estimated using AADF from previous year on this link 14,581 12,307 1,865 209 160 83 117
2019 Estimated using AADF from previous year on this link 18,852 16,203 2,113 238 140 113 185
2018 Estimated using AADF from previous year on this link 18,676 16,002 2,132 239 127 120 183
2017 Manual count 18,833 16,180 2,093 237 115 121 201
2016 Estimated using AADF from previous year on this link 25,602 21,427 3,268 420 92 217 270
2015 Estimated using AADF from previous year on this link 25,014 21,098 2,992 411 99 222 292
2014 Estimated using AADF from previous year on this link 25,262 21,492 2,845 413 106 218 294
2013 Estimated using AADF from previous year on this link 25,082 21,717 2,498 384 110 205 277
2012 Manual count 25,195 21,841 2,470 385 111 205 295
2011 Estimated using AADF from previous year on this link 20,666 17,278 2,585 518 172 152 133
2010 Estimated using AADF from previous year on this link 20,664 17,365 2,508 514 156 144 133
2009 Estimated using AADF from previous year on this link 21,049 17,737 2,496 533 156 156 127
2008 Manual count 21,175 18,026 2,305 549 156 165 130
2007 Estimated using AADF from previous year on this link 22,780 19,381 2,552 506 78 246 95
2006 Manual count 23,531 20,338 2,339 511 125 244 99
2005 Estimated using AADF from previous year on this link 22,931 19,925 2,072 617 104 198 119
2004 Manual count 23,417 20,436 2,019 645 122 196 121
2003 Estimated using AADF from previous year on this link 22,061 18,722 2,121 818 86 260 140
2002 Manual count 22,084 18,988 1,946 761 97 232 157
2001 Manual count 21,933 19,418 1,774 448 79 184 109
2000 Manual count 20,039 17,324 1,917 446 58 204 148

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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 17027 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 17027 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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