National Capital Transportation Amendments

[AI summary unavailable — showing source text] National Capital Transportation Amendments - Amends the National Capital Transportation Act of 1969 to authorize the Secretary of Transportation to make contributions to the Washington Metropolitan Area Transit Authority, in addition to those already authorized by such Act, for the purpose of financing in part the construction costs of the Adopted Regional System (Metrorail). Requires a matching contribution by the local participating governments in a total amount that is not less than 25 percent of such additional Federal contributions. Authorizes the appropriation, for such purposes, of an amount not to exceed $1,700,000,000 for fiscal years beginning on or after October 1, 1980. Directs the Transit Authority to establish a sinking fund for the accumulation of assets for payment of principal on bonds and other obligations issued by the Authority. Authorizes the Secretary to make contributions to such fund beginning October 1, 1997, and requires a matching contribution by the local participating governments in a total amount not less than 25 percent of such Federal contribution. Permits the Transit Authority to use income from the investment of moneys in such sinking fund to pay i…