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Road traffic statistics

990089

Details

AADF latest year 2009
Region East of England
Local authority Hertfordshire
Road name B158
Road type Minor
Start junction road -
End junction road -
Link length -
Easting & Northing 532370,213460
Latitude & longitude 51.80413,-0.08154

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
2009 Manual count 8,923 7,822 903 72 78 69 57
2008 Manual count 9,097 7,778 1,077 75 75 118 49
2007 Manual count 9,140 7,838 1,104 60 38 92 46
2006 Manual count 9,250 8,026 979 65 64 111 69
2005 Manual count 9,315 8,215 905 69 43 69 57
2004 Manual count 9,894 8,684 925 141 77 86 58
2003 Manual count 10,114 8,843 936 147 96 127 61
2002 Manual count 10,124 8,897 917 106 66 126 78
2001 Manual count 9,599 8,481 882 68 72 91 77
2000 Manual count 10,227 9,085 916 83 54 57 86

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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 990089 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 990089 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. 10
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. 20
Raw counts Vehicle counts recorded at this count point. 240

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