In fact, gas taxes cover a relatively small portion of the total road costs resulting from motor vehicle use. Federal, state, and local highway user fees, derived from a combination of gas taxes and other motor vehicle related fees, are sufficient to pay approximately 80 percent of road construction and maintenance costs.1 However, the costs of road construction and maintenance are not the only costs of motor vehicle operations and the other costs are significant.
Bicyclists pay for roads because Oregon increasingly is using fixed fees, rather than mileage-based fees to fund road construction and maintenance:
- During the recent sessions, the legislature has increased highway fund revenues to pay for a series of bridge reconstructions, freeway expansions, and other road projects. However, rather than increasing the gas tax that is connected to road usage (albeit imperfectly), the state legislature has increased registration and title fees that are paid by all motor vehicle users regardless of the extent to which they actually drive the vehicles. In some cases, these fees have been increased more than five-fold in the span of a decade.2
- Almost 90 percent of bicyclists also own at least one motor vehicle. With the decrease in the portion of Oregon highway funds derived from gas taxes and the increase in the portion of fees associated with car ownership, motor vehicle-owning bicyclists now contribute a disproportionate share to state highway funds compared to those taxpayers who heavily use their motor vehicles.
- During the 2007-2008 fiscal year, the $7 million that the City of Salem anticipated receiving as its share of the state highway fund was sufficient to pay only about 25 percent of the spending that the city budgeted for streets. This was prior to the city’s passage of a $99.8 million general obligation bond measure to be repaid with property taxes at the approximate rate of $64 per year for a typical home.3
- In the Portland area, Metro’s budget includes almost $200 million for transportation projects, with only about 15 percent of the funding coming from the state highway fund.
- The costs incurred by developers in constructing streets represent another property-related fee that may increase the cost of a new home by as much as $5,000.4
- These communities are not atypical in imposing the costs of streets on all residents of the community, regardless of whether they own or operate a motor vehicle, either through their property taxes or rent payments.
- Motor vehicle use imposes many costs on communities including those from congestion, air and water quality, noise, and health care after crashes. Inclusion of these external costs (costs to society in general) more than double governmental expenditures on roads.5
- The marginal cost of operating an automobile is 2.91 cents per mile on a rural interstate and 10.41 cents per mile on an urban interstate highway.6 The efficiency of the average US passenger car is 22.5 miles per gallon. Thus, the gas tax would have to be more than $2.34 per gallon to fully pay the costs of operating an automobile on an urban freeway. (Oregon’s gas tax is 24¢ per gallon, scheduled to increase to 30¢ per gallon not later than January 1, 2011 and the federal excise tax on gasoline is 18.4¢ per gallon.)
- The current user fees from the purchase of gasoline fall far short of paying the full costs of motor vehicle operation. As taxpayers, bicyclists incur a portion of the unmet costs regardless of their lower impact on roads.
- Not only are the user fees for motor vehicle use inadequate to pay the associated costs to the public, motor vehicle use is subsidized in a number of other ways. Subsidies are provided through corporate income taxes, sales taxes, property taxes, and personal income taxes.7
- Other public costs that have been identified as incurred, but not included in the costs of motor vehicle operation include those resulting from free parking, sprawl, and energy security.8
1 US Department of Transportation, Federal Highway Administration, 1997 Federal Highway Cost Allocation Study Final Report, August 1997.
2 HB 2142 (2001), HB 2041 (2003), and HB 2001 (2009).
3 City of Salem, City of Salem Streets and Bridges General Obligation Bond Authorization, November 2008.
4 See Mid-America Regional Council, Smart Choices, Understanding the Cost of Development, December 2001 for case study examples of development cost components.
5 The FHWA cost allocation study estimates the external costs as follows: noise, $4.3 billion; congestion, $61.8 billion; water quality, $5 billion; and crashes, $120.6 billion. The 2000 addendum to the report estimates air quality costs as ranging from $30 to $349 billion per year.
6 US Department of Transportation, Federal Highway Administration, Addendum to the 1997 Federal Highway Cost Allocation Study Final Report, May 2000.
7 Mark A. Delucchia and James J. Murphy, How large are tax subsidies to motor-vehicle users in the US?, Transport Policy 15 (2008) 196–208.
8 US Department of Transportation, Federal Highway Administration, 1997 Federal Highway Cost Allocation Study Final Report, August 1997.
9 Todd Litman, Whose Roads? Defining Bicyclists’ and Pedestrians’ Right to Use Public Roadways, Victoria Transport Policy Institute, November 2004.
I wrote this for use by the Bicycle Transportation Alliance and other cycling advocates during discussions about funding with lawmakers.