Traffic Count

Traffic Count
Alternative Title
Traffic count sites
Dataset Language
Traffic flow data from count sites in Hertfordshire.
Topic Category
Traffic counts
from 2005 to 2009
Dataset Reference Date
Bounding Coordinates
West Bounding Longitude:
East Bounding Longitude:
North Bounding Latitude:
South Bounding Latitude:

OS National Grid References
West: 486000 East: 552000 North: 245000 South: 189000
Vertical Extent
Spatial Reference System
001 National Grid of Great Britain
Spatial Resolution
Resource Locator
Webmaps-extra: Location in Hertfordshire
Responsible Organisation
Steve Bayley
Mapping & GIS Officer
Community Information Unit
Corporate Services
Hertfordshire County Council
Role: Distributor

Sue Jackson
Senior Engineer - Traffic Data & Modelling
Transportation Planning & Policy (TPP)
Hertfordshire County Council
Role: Originator
Update Frequency
annually 008
Limitations on Public Access
licence 005
Access and Use Constraints
Additional information source
Unique Resource Identifier
Resource Type
6 dataset
Originating Controlled Vocabulary
UK Public Sector Vocabulary (IPSV)
2. notConformant
UK Gemini
Metadata update date
Metadata Language
English eng
Metadata Point of Contact
Amy Malcolm
Trainee GIS Analyst
Community Information Unit
Corporate Services
Hertfordshire County Council
Tel : 01992 555248
Review date
Annually (in August)
Name Long Name Description
Countsite Site No. The site number
Location Location Description of the location
AAWD2009 AAWD 2009 Patched annual average week day traffic flow for 2009
AAWD2008 AAWD 2008 Patched annual average week day traffic flow for 2008
AAWD2007 AAWD 2007 Patched annual average week day traffic flow for 2007
AAWD2006 AAWD 2006 Patched annual average week day traffic flow for 2006
AAWD2005 AAWD 2005 Patched annual average week day traffic flow for 2005

Annual Average Weekday Flow (AAWD)

The deseasonalised average traffic flow (two way) representing the typical volume of vehicles passing a count site between 0600 hours and 2200 hours on a weekday. This is roughly equivalent to AADT. Since the AAWD excludes those periods of the week more likely to be affected by 'unusual' events (eg short term roadworks, public gatherings, car boot sales), it is believed to provide a more reliable average when counts are conducted once or twice a year at a particular site.

More Information



Change History



This data is released for the official business use of Hertfordshire County Council, including it's partners, contractors and agents. It includes the intellectual property of Ordnance Survey as described in the copyright statement. It may not be passed to any third party without the written permission from Hertfordshire County Council.

Guarantee and Warranty

This data is supplied without guarantee or any warranty as to the accuracy, currency or completeness, and is provided as is, excluding any warranties of any kind, either express or implied, to the fullest extent permitted by law, including (but not limited to) satisfactory quality or fitness for a particular purpose.

Copyright Acknowledgement

© Crown copyright and database rights Ordnance Survey 100019606. You are not permitted to copy, sub-licence, distribute or sell any of this data to third parties in any form. (This restriction may not apply to HCC and its licensed contractors, agents & partners.) Use of this data is subject to terms and conditions.