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Road traffic statistics

48582

Details

AADF latest year 2024
Region South East
Local authority Slough
Road name M4
Road type Major
Start junction road 5
End junction road 4B / M25
Link length 3.30km (2.05 miles)
Easting & Northing 503000,178180
Latitude & longitude 51.49319,-0.51772

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 143,900 110,565 21,421 10,825 0 435 653
2023 Manual count 143,339 110,754 20,802 10,691 0 439 654
2022 Manual count 128,999 100,261 16,995 10,542 0 707 494
2021 Manual count 108,000 78,716 17,843 10,796 0 412 232
2020 Estimated using AADF from previous year on this link 89,512 66,330 13,453 9,019 0 370 340
2019 Manual count 130,187 102,668 16,209 10,011 0 667 632
2018 Automatic counter 150,496 117,503 20,040 11,135 0 936 882
2017 Manual count 146,847 115,474 18,926 10,674 0 918 856
2016 Estimated using AADF from previous year on this link 154,083 121,350 19,340 11,838 0 745 809
2015 Manual count 151,506 120,367 18,212 11,366 0 735 826
2014 Manual count 146,271 117,125 16,987 10,363 0 1,059 737
2013 Manual count 146,785 120,340 16,964 7,967 0 722 791
2012 Manual count 149,429 122,041 17,640 8,302 0 797 649
2011 Manual count 147,992 119,195 17,790 9,167 0 949 891
2010 Manual count 141,194 114,168 14,201 10,878 0 1,088 859
2009 Manual count 152,957 122,721 17,176 11,193 0 1,061 806
2008 Manual count 146,055 117,228 15,886 11,149 0 988 804
2007 Manual count 150,929 122,407 15,035 11,109 0 1,275 1,103
2006 Manual count 144,512 113,490 16,719 11,346 0 1,430 1,527
2005 Manual count 144,230 116,499 15,184 10,036 0 1,463 1,048
2004 Manual count 146,106 120,503 13,406 9,956 0 1,217 1,024
2003 Manual count 134,029 110,623 11,569 9,863 0 971 1,003
2002 Manual count 140,319 115,150 12,590 10,219 0 1,429 931
2001 Manual count 140,411 114,387 12,682 10,776 0 1,512 1,054
2000 Manual count 175,138 150,457 14,360 8,120 0 997 1,204

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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 48582 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 48582 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. 504

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