Here are some resources for information about transportation funding in Oregon. For specific questions, please contact Ask ODOT.
State Transparency Website (revenue, contracting and expenditure reports for all agencies including ODOT)
How does the federal sequester affect ODOT funding?
Transportation funding trends (mountain chart)
Transportation funding programs (through ODOT)
Statewide transportation improvement program (Fix it or Enhance it)
ODOT budget information
ODOT budget book (pdf) - A simple explanation of transportation funding and ODOT's budget.