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Road traffic statistics

16431

Details

AADF latest year 2013
Region East of England
Local authority Hertfordshire
Road name A41
Road type Major
Start junction road A411 / M25 J19 SPUR
End junction road A405
Link length 1.30km (0.81 miles)
Easting & Northing 509005,199553
Latitude & longitude 51.68417,-0.42463

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
2013 Manual count 37,095 31,314 4,347 973 19 340 121
2012 Manual count 36,919 31,383 4,084 1,082 22 257 113
2011 Manual count 38,098 32,128 4,366 1,115 24 332 157
2010 Manual count 35,596 29,374 4,339 1,331 26 428 124
2009 Estimated using AADF from previous year on this link 38,914 32,556 4,155 1,417 30 582 204
2008 Estimated using AADF from previous year on this link 39,267 32,984 4,022 1,510 26 557 194
2007 Manual count 39,510 33,216 4,014 1,515 26 574 191
2006 Estimated using AADF from previous year on this link 43,365 36,329 4,655 1,694 27 538 149
2005 Estimated using AADF from previous year on this link 42,468 35,721 4,442 1,655 27 495 155
2004 Estimated using AADF from previous year on this link 42,551 35,973 4,247 1,653 27 516 162
2003 Manual count 41,445 35,372 3,815 1,554 27 508 196
2002 Estimated using AADF from previous year on this link 39,308 33,331 4,007 1,238 28 516 216
2001 Estimated using AADF from previous year on this link 38,282 32,392 3,975 1,200 26 506 209
2000 Estimated using AADF from previous year on this link 37,047 31,418 3,764 1,204 30 458 203

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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 16431 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 16431 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. 14
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. 28
Raw counts Vehicle counts recorded at this count point. 144

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