[6] In 2020, the UK government consulted about adding to the Highway Code a road user hierarchy prioritising pedestrians.
[8] The Green Transportation Hierarchy: A Guide for Personal & Public Decision-Making by Chris Bradshaw was first published September 1994[9] and revised June 2004.
[citation needed] As part of a pedestrian advocacy group in the United States, he proposed the hierarchy ranking passenger transport based on environmental emissions.
[3] It was first prepared for Ottawalk and the Transportation Working Committee of the Ottawa-Carleton Round-table on the Environment in January 1992, only stating 'Walk, Cycle, Bus, Truck, Car'.
[11] The model rejects the concept of the balanced transportation system, where users are assumed to be free to choose from amongst many different yet ‘equally valid’ modes.