ODI Leeds

Traffic growth

Visualising cycle count and footfall data. Select a counter to see charts. See more about the data below.

There will be a map here which will show the traffic counters and let you select them. In the mean time try this example which will load two counters.


We created this visualisation to explore cycle sensor and footfall sensor count data published by Local Authorities.

The cycle data published by York City Council covers the period 2003-2016 and aggregates counts between midnight to 6am into one big block. We have split the count for those periods into hourly blocks.

Source data

Processing and code

Local Authorities tend to publish large, time-period-based, files that each contain data for all their counters during that time e.g. Leeds publish cycle counts by year and the 2019 data file was over 34MB. Those sizes are impractical for web-based visualisations such as this so we have created processed data files with one counter per file. In each file, the counts are arranged with one row per day and one column per hour interval; a counter with 8 years of hourly data becomes around 100kB.

The code for this visualisation is published on Github under an MIT licence.

Get involved

If you publish foot/cycle/vehicle count data and would like to have it included in this tool, get in touch with @ODILeeds. This visualisation allows for a distributed publishing approach so you can publish files (in our CSV format) on your own server. You would then create a JSON index file with metadata about each of your counters.