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Road traffic statistics

78350

Details

AADF latest year 2024
Region East of England
Local authority Hertfordshire
Road name A4145
Road type Major
Start junction road A404
End junction road Chenies Way, Watford
Link length 3.60km (2.24 miles)
Easting & Northing 507720,194000
Latitude & longitude 51.63451,-0.44492

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 10,024 8,162 1,672 130 25 58 3
2023 Manual count 9,871 8,040 1,642 129 25 56 3
2022 Estimated using AADF from previous year on this link 10,204 8,096 1,782 260 41 64 3
2021 Estimated using AADF from previous year on this link 9,535 7,580 1,644 251 46 58 3
2020 Estimated using AADF from previous year on this link 8,680 6,880 1,508 234 56 55 3
2019 Estimated using AADF from previous year on this link 11,111 9,058 1,708 266 49 74 5
2018 Estimated using AADF from previous year on this link 11,021 8,945 1,723 268 45 79 5
2017 Estimated using AADF from previous year on this link 11,089 9,045 1,692 266 40 80 5
2016 Estimated using AADF from previous year on this link 11,071 9,112 1,607 267 42 79 6
2015 Manual count 10,829 9,000 1,488 255 42 79 6
2014 Estimated using AADF from previous year on this link 11,806 9,318 2,195 195 58 88 10
2013 Estimated using AADF from previous year on this link 11,521 9,189 2,042 195 72 86 10
2012 Estimated using AADF from previous year on this link 11,555 9,362 1,902 195 73 85 11
2011 Estimated using AADF from previous year on this link 11,742 9,632 1,813 194 78 92 11
2010 Manual count 11,604 9,603 1,714 192 90 84 11
2009 Estimated using AADF from previous year on this link 10,792 8,666 1,731 300 31 78 17
2008 Estimated using AADF from previous year on this link 10,890 8,771 1,699 329 27 74 17
2007 Estimated using AADF from previous year on this link 11,244 9,108 1,699 348 27 74 15
2006 Estimated using AADF from previous year on this link 11,303 9,352 1,541 321 27 74 15
2005 Estimated using AADF from previous year on this link 10,985 9,097 1,469 316 29 88 15
2004 Estimated using AADF from previous year on this link 10,943 9,106 1,399 327 27 96 15
2003 Manual count 10,916 9,097 1,388 320 28 93 18
2002 Estimated using AADF from previous year on this link 10,667 9,016 1,232 326 34 76 17
2001 Estimated using AADF from previous year on this link 10,463 8,909 1,142 319 32 77 16
2000 Estimated using AADF from previous year on this link 10,400 8,883 1,105 327 36 69 16

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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 78350 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 78350 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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