A nice piece of research from The Victoria Transport Policy Institute:
Many people believe that non-motorized modes (walking, cycling, and their variants) have less right to use public roads than motorists, based on assumptions that motor vehicle travel is more important than non-motorized travel and motor vehicle user fees finance roads. This report investigates these assumptions. It finds that non-motorized modes have clear legal rights to use public roads, that non-motorized travel is important for an efficient transport system and provides significant benefits to users and society, that less than half of roadway expenses are financed by motor vehicle user fees, and pedestrians and cyclists pay more than their share of roadway costs. Since bicycling and walking impose lower roadway costs than motorized modes, people who rely on non-motorized modes tend to overpay their fair share of roadway costs and subsidize motorists.
Read the whole report here: