Engineering Commons^™

Environmental Commitment Follow-Up, Theodore Hopwood Ii, Sudhir Palle

Kentucky Transportation Center Research Report

Three recently completed road construction projects were investigated to determine Kentucky Transportation Cabinet (KYTC) effectiveness in implementing project commitments (including environmental commitments). Documentation was obtained from KYTC districts in which the projects were constructed and KYTC officials involved with the projects from planning through construction were interviewed. The projects were inspected to audit completion of project commitments. Key stakeholders (officials of local governments, resource agencies, MPOs, interest groups, and adjacent landowners) were interviewed about the projects. They were asked to grade KYTC for implementation of project commitments using a standard report card format. The findings for these investigations are presented. …

Evaluation Of Us 119 Pine Mountain Safety Improvements: Ihsdm Analysis Of Post Construction, Will Conkin, Nikiforos Stamatiadis

Kentucky Transportation Center Research Report

The spot improvements on US 119 in Letcher County between Whitesburg and Partridge were an attempt to improve safety throughout the corridor. To achieve this goal, the roadway alignment and cross section were changed at various locations. In addition, problems related to truck traffic were considered in redefining the roadway geometries. The total length of the spot improvement locations was approximately 6.9 miles.

Evaluation Of Current Incentive/Disincentive Procedures In Construction, Brad W. Rister, Yuhong Wang

Kentucky Transportation Center Research Report

This study was initiated to take an in-depth look at the current time and material incentive/disincentive program associated with highway construction projects in Kentucky. The current incentive/disincentive program was first initiated in the mid to late 90’s. However, not until recently had some of the original mechanisms of the program been revisited and/or up-dated.

From the early stages of this study it was anticipated that many of the concerns regarding the use of both time/material incentives and disincentives on highway construction projects in Kentucky would be addressed. Therefore, at the onset of this project the study advisory committee made a …

Safety And Health Concerns For Kytc And Contractor Personnel, Theodore Hopwood Ii, Sudhir Palle

Kentucky Transportation Center Research Report

This study was initiated to provide a review of safety and health issues related to Kentucky Transportation Cabinet (KYTC) construction activities including both KYTC and contractor personnel. Work included a literature search, interviews with KYTC resident engineers, and both a survey of and subsequent meeting with district construction safety coordinators. Recommendations are provided for implementing changes to improve safety and health regulatory compliance for both KYTC and contractor personnel.

Nu-Deck Precast Deck Panels And Innovative Bridge Research And Construction, Maher K. Tadros, Charles J. Vranek

Nebraska Department of Transportation: Research Reports

Most of the deficiency in existing stringer-type bridges lie in deterioration of the bridge deck. Cast-in-place reinforced concrete decks experience cracking shortly after construction due to large differential creep and shrinkage with the supporting beams, and due to the temperature drop experienced during the hydration cycle. The NUDECK (Nebraska University) system is a full-depth precast/prestressed concrete bridge deck panel system. The combination of high performance precast concrete, where little creep and shrinkage occur after the deck is made composite with the beams, and two-way prestressing assure continued pre-compression of the deck during its life. With this system, construction time and …

Evaluation Of Working Capacity For Disadvantaged Business Enterprises (Dbe) For Highway Construction In Kentucky, Fy 2004 Update, Brad W. Rister, Raymond F. Werkmeister, Paul E. Toussaint

Kentucky Transportation Center Research Report

The Kentucky Transportation Center gathered the appropriate information, performed a series of computations and analyses, prepared the attached documentation, and makes the following recommendations to the Kentucky Transportation Cabinet for their DBE goal for Federal Fiscal year 2004 (October 1, 2003 - September 30, 2004).

KTC recommends an overall DBE goal of 9.26%, of which 1.931% is anticipated to be satisfied by race/gender neutral prime contracts, and the resultant 7.33% should established as race/gender conscious subcontracts. The overall DBE goal figures stated here addresses an adjustment of 1.326% for the positive historical goal variance observed for the past eight years.

Assessment And Modeling Of Stream Mitigation Procedures [2003], Bernadette S. Dupont, Sudhir Palle

Kentucky Transportation Center Research Report

As population increases, so does the need to improve and augment the road network. Construction of new roadways or modification of existing roads often requires diversion or modification of streams. If a stream is disturbed, government regulations require mitigation or compensatory replacement of the affected area in a similar environment. Stream mitigation is of particular importance in Kentucky, as Kentucky ranks second in the United States for having the most miles of waterways. Consequently, stream mitigation has become a significant factor in roadway construction costs. To date, no studies have been made to assess the execution of the mitigation plans …

Safety Impacts Of Rural Road Construction, Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

Crash data in Kentucky show that the fatal crash rate on two-lane rural roads is substantially higher than on any other type of road. Improvements have been proposed at some locations on this type of road which involve either upgrading the existing two-lane road or adding lanes resulting in a four-lane road. As part of the public information process, highway officials have been asked to document the previous results of this type of construction. The objectives of this study were to: 1) identify sections of two-lane rural roadways where either the two-lane road had been realigned and reconstructed or additional …

Nighttime Construction Issues, Donn E. Hancher, Timothy R. B. Taylor

Kentucky Transportation Center Research Report

This report addresses several issues to consider when considering performing highway construction work in Kentucky at night. Surveys of other state departments of transportation and Kentucky highway contractors were made to identify best practices and concerns. An advisory committee of experienced KyTC engineers plus contractor representatives met extensively to identify successful approaches for handling key issues which arise on night-time construction projects.

Seventeen specific recommendations have been proposed to enhance the Cabinet's use of night-time construction for its projects. These cover several issues related to night-time work, including contract requirements, traffic control, law enforcement, personnel issues, lighting and public awareness. …

Long-Term Monitoring Of Experimental Features, Subtask 2: Alexandria-Ashland Highway (Ky 9) Pavement Performance Monitoring, L. John Fleckenstein, Monica L. Osborne, David L. Allen

Kentucky Transportation Center Research Report

Construction on the AA Highway began in late 1985 and was completed in late 1990. Prior to construction, 30 different test sections had been designed into the highway for evaluation. The test sections contain 23 different characteristic qualities and different segment lengths. The segment lengths range from 1.28 to 9.13 miles and took one and a half to four years to complete each segment.

The sections were constructed from various pavement and shoulder designs. The designs are varied by parameters such as the type of subgrade stabilization, drainage type, surface class, surface aggregate, and more. The purpose for monitoring the …

Evaluation Of Superpave In Kentucky, L. John Fleckenstein, David L. Allen, Richard Reitenour

Kentucky Transportation Center Research Report

Approximately 93 percent of all pavements in the United States are surfaced with hot-mix asphalt (HMA). For many decades, most asphalt pavements were designed using the Marshall mix design method. In 1987, the Strategic Highway Research Program was established with 50 million dollars being allocated for asphalt pavement research. From that research, a new asphalt mix design procedure, called Superpave, was developed. Many states have adopted, or are in the process of adopting, this procedure, including Kentucky. In 1995, Kentucky placed its first Superpave mixture on KY 676 in Franklin County. In 1998, the Kentucky Transportation Cabinet requested that the …

Development Of A Critical Path Method Specification And A Training Program For Use Of Cpm For Kytc, Donn E. Hancher, Raymond F. Werkmeister, Sion L. Tesone

Kentucky Transportation Center Research Report

The Critical Path Method scheduling technique is outlined as it applies to KYTC projects. Special Provision 82 (94) and its requirements are outlined.

Cost Estimating And Forecasting For Highway Work In Kentucky [1996], James D. Stevens, Jennifer R. Walton

Kentucky Transportation Center Research Report

There is a need for better cost estimating and forecasting for highway work in the Commonwealth of Kentucky. KRS45.245 grants the Interim Joint Committee on Transportation oversight of the biennial highway plan, including a review of all authorized highway project phases that exceed their estimates by 15%. In recent years, the Kentucky Transportation Cabinet has suffered the loss of many resources necessary to produce good cost estimates.

Estimates developed using current methods are not sufficiently accurate to preclude cost overruns in excess of 15%. Over the 1992 and 1994 bienniums, 362 overruns totaling $162,487,511 have been submitted to the Committee. …

Bearing Capacity Analysis Of Pavements, Tommy C. Hopkins

Kentucky Transportation Center Research Report

A multilayered, mathematical model for analyzing the ultimate bearing capacity of soil subgrades and asphalt pavements is presented. Theoretical considerations and mathematical derivations of limit equilibrium equations, based on plasticity principles, for analyzing the ultimate bearing capacity of soil subgrades and partially completed asphalt pavements, and the extension of these equations to the analyses of asphalt pavements composed of multiple layers, are presented. The model is unique since shear strength parameters, Φ and c, (the angle of internal friction and cohesion, respectively) are used to describe each layer of material of the pavement structure and a factor of safety against …

Sprinkle-Treated Asphaltic Concrete Surface Course, Donald C. Newberry Jr.

Kentucky Transportation Center Research Report

This report gives details of construction and some skid resistance data from experimental sprinkle-treatment placed in Nelson County, Kentucky, north of Bardstown, US 31-E. The various types of aggregate, application rates, and precoating processes are reported.