What is the minimum width for a cycle lane?

First of all you need to allow 1.0 m for the 'cyclist envelope'. The minimum width between the 'cyclist envelope' and passing trucks is then 1 m for 60 km/h, 1.5 m for 70 km/h, 1.5 m for 80 km/h and 2.0 m for 100 km/h.

If you can't fit the logo in then its safe to say it's not right.

Pedestrians and cyclists are the most vulnerable road users. We should design for them first and then design for cars and trucks around them, not the other way around.

Cycle lane design guidance can be found in Austroads Guide to Road Design Part 3: Geometric Design (2021) and Guide to Road Design Part 6A (2017) - available to download for free from Publications | Austroads.

Austroads 'Cycling Aspects of Austroads Guides', 'Australian National Cycling Strategy', 'Low Cost Interventions to Encourage Cycling' and 'Cycling Infrastructure Case Studies' also provide some useful guidance.