In May 2000, the Colorado Department of Transportation (CDOT) requested a forensic study of a project located on I-24 north of Denver. The request was made because, within a year of the 1997 overlay, longitudinal cracking appeared in the surface. Transverse cracks were attributed to reflective cracking. However, the longitudinal cracks appeared to be surface initiated. In October 2000, a forensic team reviewed the project and established a sampling and testing plan to take cores from the roadway. Based on data analysis of the cores, the higher than expected in-place air voids, the low effective asphalt, and segregation within the mat, all contributed to the early cracking.

The environmental reports of 12 Scottish Strategic Environmental Assessments have been subject to critical analysis in order to assess the extent to which they include Cumulative Effects Assessment (CEA) as a required component under the SEA directive. The anticipated benefits of assessing Cumulative Effects in a strategic setting are wide-ranging and well researched, yet there appears little documented evidence of this in the Scottish context. The level of Cumulative Effects inclusion in the reports studied was investigated, along with the parameters that appear to limit the success of the lauded relationship between these environmental assessment tools. An 8 criteria review-based methodology was constructed, based on a best-practice framework from the extensive literature synthesis provided, and it served to evaluate Cumulative Effects inclusion throughout the assessment process. In addition, the authors of 5 of the 12 Environmental Reports were interviewed to gauge understanding on the phenomenon of Cumulative Effects, Cumulative Effects Assessment, and how it is best integrated into SEA. The results of these interviews were then subject to thematic analysis, and compared to the findings of the review criteria. The findings of this research suggested CEA is a low priority in Scottish SEA practice. CEA was found to be carried out in an irregular and sometimes reluctant fashion. In particular, the Environmental Reports under scrutiny showed only limited CEs considerations and methodologies. In interview, practitioners provided largely inadequate definitions of Cumulative Effects and showed limited conceptual understandings of Cumulative Effects Assessment. Overall, CEA appears undervalued as an assessment tool in arguably its most appropriate context.

Corrosion of reinforced concrete structures has been a significant problem for many state and transportation agencies since the application of deicing salts was introduced. Much research has been conducted to develop corrosion protection systems that can prolong the life span of reinforced concrete structures. The Colorado Department of Transportation (CDOT) has several routine and experimental measures to prevent corrosion of the rebar including epoxy-coated rebar, calcium nitrite admixture, organic corrosion inhibitors, a thick cover of quality concrete, and a waterproofing membrane covered by an asphalt overlay. An extensive literature review was performed to collect information on various corrosion protection systems that have been used in the U.S. and around the world. Current CDOT practices in terms of corrosion protection measures were reviewed. A draft inspection plan for Colorado's bridge structures was proposed.

The objective of this document is to provide a single source of sketch planning data on the most important performance characteristics of contemporary urban transportation systems in a format that lends itself to easy reference. This handbook does not deal explicitly with passenger demand, but assesses also the supply or performance characteristics of urban transportation systems, including the following: speed; capacity; operating costs; labor inputs; capital costs; energy consumption; emission of air pollutants; and, accident rates and costs. The following modes are discussed: rail transit (rapid, light, and commuter); bus transit; automobiles, trucks, and the highway system; high occupancy vehicle (HOV) lanes; and, automated guideway transit (AGT).

"TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 448: State Department of Transportation Small Business Programs identifies successful strategies that maximize Disadvantaged Business Enterprise program achievements through race-neutral measures." -- Publisher's description.