An amendment comprised of several amendments offered en bloc and as modified to make numerous technical changes; substitute several projects for other projects specified in the bill; deauthorize certain projects; reallocate funding among various projects in Texas; require the Transportation Department to establish requirements for the economic reuse and environmentally sound disposition of pavement materials removed during highway construction and repaving projects; and to set aside specified levels of mass transit bus funding for grants to test certain buses, vans, and paratransit vehicles. The en bloc amendment also includes provisions which identify the High Priority Corridor "Avenue of the Saints", which is to connect St. Louis and St. Paul, as traveling through Missouri, Iowa, and Minnesota; make certain technical changes regarding a proposed light rail project in South Boston and to provide funds apportioned for Interstate system construction in Massachusetts will remain available until expended; and make various changes in the bill's provisions regarding the International Registration Plan and the International Fuel Tax Agreement. Further, the amendment also incorporates five other amendments made in order by the rule which are as follows: the Waxman amendment to strike a provision of the bill which authorizes states, in developing sta.ewide transportation plans, to develop the transportation portion of state clean air implementation plans and instead clarify that states must carry out the responsibilities allocated to them under the Clean Air Act for the transportation portion of state implementation plans; the Bereuter amendment to require the Transportation Department study on effects of climatic conditions on costs of highway design, construction, and maintenance in various regions and to report to Congress on the implications of these costs on the allocation of highway finds to states; the Hochbruekckner amendment to prohibit the Transportation Department from approving certain projects unless their construction will be undertaken during off-peak hours; the Schumer amendment clarifying that the neither the bill nor existing law precludes the use of buses acquired or operated with Federal assistance to provide express bus service in New York City; the Coughlin amendment outlining state guidelines for the implementation of safety programs for rail mass transit systems.