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Road traffic statistics

99610

Details

AADF latest year 2024
Region Wales
Local authority The Vale of Glamorgan
Road name M4
Road type Major
Start junction road 34
End junction road 33
Link length 3.40km (2.11 miles)
Easting & Northing 307164,179663
Latitude & longitude 51.50824,-3.33908

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 Manual count 107,273 81,036 18,817 6,965 0 284 171
2023 Manual count 103,650 78,607 17,423 7,139 0 262 219
2022 Estimated using AADF from previous year on this link 95,016 68,086 19,037 7,538 0 205 150
2021 Estimated using AADF from previous year on this link 84,543 60,068 16,734 7,428 0 182 130
2020 Manual count 73,926 52,545 14,316 6,756 0 179 130
2019 Estimated using AADF from previous year on this link 109,771 85,851 16,409 7,011 0 216 283
2018 Manual count 108,458 84,555 16,422 6,975 0 224 283
2017 Estimated using AADF from previous year on this link 104,413 80,643 15,023 8,008 0 335 403
2016 Estimated using AADF from previous year on this link 103,039 80,731 13,856 7,678 0 362 412
2015 Manual count 101,453 80,077 13,047 7,551 0 357 421
2014 Manual count 102,970 83,096 12,322 6,917 0 308 326
2013 Manual count 103,361 81,963 13,053 7,558 0 378 409
2012 Manual count 96,932 77,352 11,958 7,099 0 233 290
2011 Manual count 85,316 68,230 9,366 7,171 0 267 282
2010 Manual count 99,868 79,289 12,854 7,038 0 433 254
2009 Manual count 101,898 82,471 11,540 7,155 0 422 310
2008 Manual count 108,546 86,280 12,615 8,748 0 493 410
2007 Estimated using AADF from previous year on this link 102,278 82,265 12,548 6,308 0 512 645
2006 Manual count 101,443 82,513 11,491 6,406 0 450 583
2005 Estimated using AADF from previous year on this link 102,613 81,252 11,408 9,166 0 321 466
2004 Manual count 100,354 80,051 10,456 9,019 0 341 487
2003 Estimated using AADF from previous year on this link 79,622 63,568 6,684 8,623 0 259 488
2002 Manual count 78,262 62,814 6,300 8,469 0 242 437
2001 Manual count 84,196 62,998 10,242 10,046 0 293 617
2000 Manual count 84,906 66,256 9,224 8,672 0 252 502

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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 99610 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 99610 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. 408

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