TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 419: Transportation Improvement Program Revision Process compiles and documents the different ways that metropolitan planning organizations (MPOs) approach revising a Transportation Improvement Program (TIP) once it has been adopted.
Federal legislation requires MPOs to adopt and regularly update a TIP identifying a prioritized list of projects covering a four-year period.
National Research Council. NCHRP Synthesis 419: Transportation Improvement Program Revision Process. Washington, DC: The National Academies Press, 2011.
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