DfT AADF Counts
DfT Annual Average Daily Flow for a count point on each Thames bridge approach, year by year from 2000.
AADF is an estimated annual average for a single approach-road count point. Counted years are more reliable than estimated years; the chart marks which is which.
Data last updated 1 June 2025 Source: DfT Road Traffic Statistics (AADF)
Frequently asked questions
What does an "estimated" DfT year mean compared to a "counted" year?
DfT physically counts each count point every six years and statistically estimates the in-between years from related count points. Counted years are more reliable; this chart preserves and marks the estimation_method on every data point. Source: DfT Road Traffic Statistics (AADF).
Linked charts
Traffic on the 5 west-London bridges, indexed to 2018
Annual motor traffic on the five western Thames road bridges, Hammersmith, Putney, Chiswick, Kew, and Wandsworth, indexed so that 2018 = 100.
Thames Bridges
Thames Bridge Traffic, 1986 to 2024
Annual motor traffic on every Thames road bridge from Hampton Court to Tower Bridge, combining TfL Thames Screenline counts with DfT AADF estimates.
Thames Bridges
TfL Thames Screenline Counts
Actual traffic counts on every Thames road bridge, conducted by TfL every two years since 1986. Manual classified counts on weekdays in June or July, obtained via FOI.
Thames Bridges