There has been a high interest in traffic removal over the last couple of years. In the academic sphere, colleagues from UWE and UCL have collaborated to create a website to compile resources on the subject.
By 'traffic removal' they mean: pedestrianisation, road closures, reduction of road capacity or filtering of traffic using obstacles, signed restrictions or devices such as bus gates.
This informal partnership has also organised two events, 'Traffic Removal for Transforming City Centres' (London, 30 October 2018) and 'Making Traffic-Free Spaces in Towns and Cities' (Bristol, 15 September 2017). The presentations from both of those events can be downloaded from the same website here.
The website also includes a sign up form to stay informed on future activities.