Streetsblog San Francisco

(Image: Subsidyscope)

But the subsidy debate often overlooks the government tax exemption for workers' parking expenses. And federal parking subsidies are skyrocketing, as Subsidyscope revealed yesterday in its data-packed report on U.S. transport spending: the value of tax-free parking will reach $3 billion this year, compared with $500 million in subsidies for transit use.

The imbalance might be corrected if the government treated parking and transit equally when it came to tax benefits. Workers can write off a maximum of slightly more than $200 in monthly parking benefits, while the maximum tax-free value of transit passes is about $100 less per month.

Subsidyscope, a joint project of the Pew Charitable Trusts and the Sunlight Foundation, pored over federal records to produce a searchable database of transportation spending dating back to the year 2000. Their researchers' conclusions found that highways received $30 billion in federal support last year -- more than three times as much as transit, which got $9 billion.

How much of that $30 billion was a subsidy? It's tough to say, according to Subsidyscope, since state DOTs are not required to report the details of how federal road aid is distributed. Still, the overwhelming majority of federal transport programs contain subsidies (see the chart after the jump for more details).

A more classic example of federal subsidy is programs that transfer the risk of new projects onto the federal government. The Transportation Infrastructure Finance and Innovation Act (TIFIA), which offers loans to states and localities at a low interest rate, is the transport sector's major source of credit subsidies from Washington -- and the majority of TIFIA loans go to highway projects.

(Image: Subsidyscope)