; (2) develop an education program with respect to employer investment in transportation and employer-based commuter programs; and (3) provide technical assistance relating to employer-based commuter programs and disseminate techniques and strategies used by successful employer-based commuter programs. . 3. Congestion mitigation during project construction Section 106 of title 23, United States Code, is amended by adding at the end the following: (k) Congestion mitigation plans (1) Requirement A recipient of Federal financial assistance under this title for a project with an estimated total cost of $75,000,000 or more or that will reduce traffic flow (as defined by the Secretary) for more than 120 days shall prepare a congestion mitigation plan for such project that includes funding for projects to reduce vehicle miles traveled during peak commuting hours along the impacted corridor. (2) Coordination A recipient shall prepare a congestion mitigation plan under paragraph (1) in coordination with any relevant employer advisory council established under section 5303(s) of title 49. (3) Review by Secretary A congestion mitigation plan prepared under paragraph (1) shall be made available to the Secretary for review upon the request of the Secretary. . 4. Employer-based commuter programs action plan (a) In general The Secretary of Transportation shall develop and implement a plan to expand and promote employer-based commuter programs (as defined in section 5303(b) of title 49, United States Code). (b) Contents The plan developed under subsection (a) shall include plans— (1) to amend existing regulations and guidance and, if necessary, develop new regulations and guidance to ensure that employer-based commuter programs are integrated, to the extent possible, into all appropriate Federal transportation programs; (2) to identify best practices with respect to employer-based commuter programs; (3) to research the effectiveness and efficiency of employer-based commuter programs