The evidence of the benefit of Bike Aid comes from common sense and my experience of commuting by bicycle to a popular Suffolk arts venue where I worked for several years. There I was frequently asked by the public, especially tourists who had hired bicycles for a day out, if someone could give them assistance with a puncture or air for their tires. This happens at other public venues and local cycle shops who I asked if they too get requests for assistance. Although infrequent, the impact and discouragement of a breakdown or puncture is disproportionally felt for a tourist or casual cyclist. Our Bike Aid survey results also indicate that the great majority of 'infrequent' cyclists don't carry tools and a puncture repair kit.
I also surveyed employee attitudes towards cycling for my MA dissertation in Management of Creative Enterprise at Norwich University College of the Arts in 2009.