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Road traffic statistics

Roadside traffic counts of Heavy Goods Vehicles are changing from 2028, your feedback will help us improve this.

27122

Details

AADF latest year 2025
Region South East
Local authority Oxfordshire
Road name A420
Road type Major
Start junction road A415 Rnbt Kingston Bagpuize
End junction road A417 Junction FARINGDON
Link length 7.6 miles
Easting & Northing 440598,198620
Latitude & Longitude 51.68488,-1.41414

Location

Streetview shows approximate location only - this panorama may be on a different road to the count point. Current panorama is less than 10 meters from this count point.

Annual Average Daily Flow

Year Count method All motor vehicles Cars & taxis LGVs HGVs Pedal cycles Motorcycles Buses & coaches
2025 Manual count 19,167 14,438 3,258 1,290 0 113 68
2024 Estimated using AADF from previous year on this link 17,699 12,819 3,130 1,584 0 118 46
2023 Estimated using AADF from previous year on this link 17,505 12,667 3,076 1,597 0 120 46
2022 Estimated using AADF from previous year on this link 17,197 12,361 3,016 1,645 0 129 46
2021 Manual count 15,982 11,517 2,708 1,598 0 116 43
2020 Estimated using AADF from previous year on this link 15,212 11,155 2,642 1,277 0 93 46
2019 Estimated using AADF from previous year on this link 19,977 15,275 3,086 1,419 0 125 71
2018 Estimated using AADF from previous year on this link 19,943 15,241 3,097 1,416 0 116 72
2017 Manual count 19,864 15,314 2,957 1,398 0 119 76
2016 Estimated using AADF from previous year on this link 17,354 12,789 2,903 1,483 0 78 101
2015 Estimated using AADF from previous year on this link 16,958 12,632 2,688 1,457 0 78 102
2014 Estimated using AADF from previous year on this link 16,234 12,262 2,418 1,374 0 76 104
2013 Estimated using AADF from previous year on this link 15,798 11,986 2,253 1,393 0 73 93
2012 Manual count 15,789 12,131 2,122 1,377 0 70 90
2011 Estimated using AADF from previous year on this link 18,931 14,944 2,386 1,395 3 162 44
2010 Manual count 18,986 15,034 2,333 1,411 3 164 44
2009 Estimated using AADF from previous year on this link 18,681 14,672 2,356 1,466 0 131 56
2008 Manual count 18,920 14,865 2,280 1,596 0 125 54
2007 Manual count 17,314 13,457 1,999 1,672 1 137 49
2006 Manual count 18,859 14,495 2,261 1,893 1 115 95
2005 Manual count 18,242 14,428 1,844 1,678 1 177 115
2004 Manual count 19,975 15,743 2,113 1,878 0 187 54
2003 Manual count 18,204 14,131 1,998 1,875 1 158 42
2002 Manual count 17,974 14,117 2,039 1,690 0 80 48
2001 Manual count 18,000 14,145 1,924 1,738 1 143 50
2000 Manual count 17,528 13,502 1,990 1,858 0 130 48

Download data

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.

Metadata

The road traffic statistics metadata PDF document provides guidance on the different datasets available to download for DfT traffic estimates.

Downloads

Site details
Manual count point site 27122 details
Annual average daily flow
Number of vehicles that travel past the count point (in both directions) on an average day of the year.
Annual average 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 27122 details 1
Annual average daily flow Number of vehicles that travel past the count point (in both directions) on an average day of the year. 26
Annual average daily flow by direction Number of vehicles that travel past the count point on an average day of the year, by direction of travel. 52
Raw counts Vehicle counts recorded at this count point. 336

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