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Road traffic statistics

Roadside traffic counts of Heavy Goods Vehicles are changing from 2028, your feedback will help us improve this.

Hertfordshire

7,472 million vehicle miles were travelled on roads in Hertfordshire in 2025.

Region East of England
Time period 1993 - 2025
Count points 875
ONS code E10000015

Road traffic by vehicle class from 1993 to 2025

Million vehicle miles travelled each year in Hertfordshire, split by vehicle class

Road traffic by vehicle class table

Million vehicle miles travelled each year in Hertfordshire, split by vehicle class

Year Cars & taxis All motor vehicles
2025 5,760.7 7,471.7
2024 5,592.4 7,361.6
2023 5,569.8 7,358.3
2022 5,437.4 7,241.2
2021 4,930.4 6,618.2
2020 4,498.1 6,073.0
2019 5,856.4 7,502.1
2018 5,899.5 7,548.5
2017 5,919.1 7,540.6
2016 5,843.4 7,426.8
2015 5,816.6 7,375.2
2014 5,728.4 7,210.7
2013 5,583.9 6,977.2
2012 5,559.8 6,928.3
2011 5,451.7 6,826.8
2010 5,273.1 6,626.3
2009 5,454.2 6,812.9
2008 5,454.2 6,846.9
2007 5,558.8 7,011.1
2006 5,570.8 6,963.4
2005 5,442.7 6,789.5
2004 5,529.6 6,870.5
2003 5,614.6 6,923.2
2002 5,682.7 6,963.0
2001 5,547.4 6,819.1
2000 5,446.0 6,680.1
1999 5,540.7 6,803.1
1998 5,482.0 6,732.0
1997 5,435.1 6,639.9
1996 5,336.3 6,493.8
1995 5,190.5 6,304.0
1994 5,069.4 6,144.4
1993 4,942.4 5,976.8

Download data

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.

Metadata

The road traffic statistics metadata PDF document provides guidance on the different datasets available to download for DfT traffic estimates.

Downloads

Count points
Details of each count point in Hertfordshire.
Traffic by vehicle class
The total volume of traffic across Hertfordshire each year, split by vehicle class.
Annual average daily flow
The number of vehicles that travel (in all directions) past each count point in Hertfordshire on an average day of the year.
Annual average daily flow by direction
The number of vehicles that travel past each count point in Hertfordshire on an average day of the year, split by direction of travel.
Raw counts
The vehicle counts recorded at each count point in Hertfordshire.
Data Description Records Download
Count points Details of each count point in Hertfordshire. 875
Traffic by vehicle class The total volume of traffic across Hertfordshire each year, split by vehicle class. 33
Annual average daily flow The number of vehicles that travel (in all directions) past each count point in Hertfordshire on an average day of the year. 10,529
Annual average daily flow by direction The number of vehicles that travel past each count point in Hertfordshire on an average day of the year, split by direction of travel. 19,877
Raw counts The vehicle counts recorded at each count point in Hertfordshire. 111,552

To apply more filters to downloads, or retrieve data split into pages you can use our API.