@mrchrisadams Hmm. There's precious little research on the actual GHG impacts of congestion charges. https://scholar.archive.org/work/udid2pclibh7tmoq5v7kmu5oxqhttp://hdl.handle.net/1828/15213
This is pretty neat! Presumably, if you knew some sensible assumptions to make about the likely CO2 per car in traffic, you'd be able to estimate the carbon reductions / air quality improvements from the congestion charge in something close to real time with this.https://bsky.app/profile/cdsamii.bsky.social/post/3lez5zsbvf22c