VicRoads

VicRoads has stated that a bike lane is able to carry three times as many people as a traffic lane:

Source: https://www.facebook.com/vicroads/posts/939309606252070

Infrastructure Victoria

Infrastructure Victoria‘s report Five-year focus: Immediate actions to tackle congestion states that cycling infrastructure can carry more than double the number of people that a car lane can:

Source: Infrastructure Victoria, Five-Year Focus, Immediate actions to tackle congestion, April 2018

London (UK)

Data from London shows that protected bicycle carry five times as many people as a vehicle lane:

Source: https://www.theguardian.com/environment/bike-blog/2017/dec/01/bike-lanes-dont-clog-up-our-roads-they-keep-london-moving

National Association of City Transportation Officials (USA)

NACTO states that bicycle lanes carry roughly five times more people than a vehicle lane:

Source: NACTO

Summary

Best practice protected bicycle lanes transport more people than a traffic lane, so re-allocating street space to a bicycle lane will reduce peak hour congestion on the remaining lane, making our streets better for drivers.

Next → the positive business case for active transport