A minor portion (perhaps 3-5%) of transportation budgets are devoted to sidewalks, bike lanes and other special facilities for non-motorized travel, but these are needed due to the risks and discomfort that motor vehicle traffic imposes on nonmotorized travel; areas with
little or no motor vehicle traffic often have no sidewalks and cyclists and pedestrians use the street. Bicycling and walking cause virtually no pavement wear and require a relatively small amount of road space, so their cost is estimated to be 5% of an automobile. Telework imposes no road facility costs.