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Road traffic statistics

503

Details

AADF latest year 2024
Region Wales
Local authority Swansea
Road name M4
Road type Major
Start junction road 47
End junction road 46
Link length 2.90km (1.80 miles)
Easting & Northing 263100,199260
Latitude & longitude 51.67538,-3.98132

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 74,241 55,691 14,000 4,119 0 252 178
2023 Manual count 73,886 55,786 13,595 4,071 0 255 179
2022 Estimated using AADF from previous year on this link 66,141 48,622 12,401 4,779 0 216 124
2021 Estimated using AADF from previous year on this link 58,799 42,896 10,900 4,702 0 192 107
2020 Estimated using AADF from previous year on this link 51,397 37,523 9,325 4,252 0 188 108
2019 Manual count 74,584 58,080 11,236 4,729 0 339 200
2018 Estimated using AADF from previous year on this link 72,345 55,248 11,714 5,098 0 130 155
2017 Manual count 72,378 55,723 11,355 5,016 0 131 154
2016 Estimated using AADF from previous year on this link 67,035 51,123 11,322 4,228 0 221 141
2015 Estimated using AADF from previous year on this link 65,881 50,709 10,662 4,149 0 218 144
2014 Manual count 64,528 50,574 9,581 3,993 0 224 156
2013 Manual count 63,037 49,261 9,441 3,810 0 316 210
2012 Manual count 64,822 51,115 9,518 3,810 0 231 148
2011 Manual count 63,117 49,494 9,428 3,856 0 162 177
2010 Manual count 62,318 49,026 8,718 4,028 0 305 241
2009 Manual count 64,054 49,874 9,522 4,288 0 217 153
2008 Manual count 62,660 47,885 9,413 4,693 0 479 190
2007 Estimated using AADF from previous year on this link 65,622 50,900 9,398 4,911 0 242 171
2006 Manual count 64,793 50,546 8,875 4,986 0 235 151
2005 Estimated using AADF from previous year on this link 55,994 42,993 8,423 4,276 0 189 113
2004 Estimated using AADF from previous year on this link 55,767 42,993 8,138 4,340 0 187 109
2003 Estimated using AADF from previous year on this link 53,732 41,822 7,385 4,132 0 211 182
2002 Manual count 54,720 42,850 7,170 4,336 0 187 177
2001 Estimated using AADF from previous year on this link 41,994 32,081 5,343 4,241 0 142 187
2000 Manual count 40,724 31,146 5,055 4,200 0 140 183

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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 503 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 503 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. 312

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