Ideas for bicycle licence plates
"If you own a car (or two) you will receive a bicycle plate with every car plate you purchase, that way when you are not in your car you can prove you have paid for your share of the infrastructure. If you don't have a car then you must purchase a plate for your bicycle.
"I am sure that within the cities there are hundreds of cyclists who do not own cars but get the benefit of bicycle lanes free of charge. Cyclists should also be mandated to carry insurance. Not all collisions are the fault of the car owner."http://www.cbc.ca/news/canada/ottawa/ottawa-traffic-april-3-1.4052400