TfL’s Road Network Performance & Research published Traffic Note reports last week. The report contains data and analysis of Traffic levels on Major Roads in Greater London between 1993-2007 for all vehicles classification types and the contact and website for traffic flow information (see extract below). Traffic Note 3 also includes Cordon and Screenline Survey which maybe useful for strategic modellers. A good practice advice note for DC work was also released last week.
Traffic flows for individual sites
9.1 Traffic information for individual count sites on major roads is available from Road Network Performance & Research – contact Tel: 0203 054 0893 or email@example.com. Maps can be provided for specific areas showing the locations of the count sites on request. These will also include locations where there is other traffic count data including Automatic Traffic Counts sites and Cordon/Screenline count sites.
9.2 For each site Annual Average Daily Flow estimates (combined direction) are produced every year and are broken down by vehicle type but not direction. The raw 12 hour manual classified weekday counts, carried out on a 1, 2, 4 or 8 year frequency depending on the variability and level of traffic at the site, are for 7am to 7pm and are available by direction, hour and vehicle type. DfT convert the raw 12-hour count into an Annual Average Daily Flow estimate (AADF) by using expansion factors derived from data collected at automatic traffic counters (ATC) scattered across London. The AADF is a 7 day/24 hour combined direction estimate. In the years when a link is not counted, a current AADF is calculated by applying growth factors to the previous year’s AADF. These factors also use data from the ATCs.
9.3 Annual Average Daily Flow Estimates for individual sites can now also be obtained online at http://www.dft-matrix.net. Sites can be located using an interactive map portal system or through a search menu system.
Other related documents:
London Travel Report 2007 – http://www.tfl.gov.uk/assets/downloads/corporate/London-Travel-Report-2007-final.pdf
Transport Statistics for Great Britain 2007 – http://www.dft.gov.uk/162259/162469/221412/217792/2214291/TSGB2007Final_linksV12.pdf