摘要: |
In 2002, AASHTO prepared a Highway and Transit Bottom Line Report based on independent analyses of national highway and public transportation investment needs through research and application of the state of the art investment analysis models utilized by FHWA and FTA. The intent of this task is to build upon and replicate that successful 2002 effort with updated and enhanced analyses of investment needs. Investment analysis at the national level has been dramatically improved with the advent of the HERS (Highway Economic Requirements System) and National Bridge Inventory Analysis System (NBIAS) models. These have introduced well-structured benefit-cost analysis methods into the national assessment process, which has been going on for over 30 years as part of the congressionally-mandated Condition and Performance Reports. More recently FHWA, the sponsor of the HERS model, has extended the capability represented by HERS to State decision-making in a version of the model called HERS ST. The States must continue to expand and enhance their capability to perform investment analysis at the individual state level and collectively at the national level. The States require a continued, strong, independent, national investment analysis capability that is integrated with state processes. |