Engineering Commons^™

Collection And Analysis Of 2013-2014 Travel Time Data, Mei Chen, Xu Zhang

Kentucky Transportation Center Research Report

This report documents the findings of Planning Study 27, Collection and Analysis of 2013-2014 Travel Time Data, which is a continuation of Planning Study 24, Analysis of Historical Travel Time Data. The main scope is to analyze newly acquired link-referenced speed data on Kentucky roads from 2013 and 2014.

Results of the analysis demonstrate the value of probe data in measuring and tracking the performance of roadways across several years. In addition, such data can help KYTC and MPOs identify bottlenecks in the network, prioritize improvement strategies, and assess the effectiveness of projects. As data collection techniques advance, …

Evaluation Of The Adaptir System For Work Zone Traffic Control, Kenneth R. Agent

Kentucky Transportation Center Research Report

The ADAPTIR system (Automated Data Acquisition and Processing of Traffic Information in Real Time) uses variable message signs (VMS) equipped with radar units, along with a software program to interpret the data, to display appropriate warning and advisory messages to motorists approaching a work zone when certain speed and delay thresholds are met. The overall conclusion of the evaluation is that the ADAPTIR type system is an effective method to provide real time information to motorists approaching a work zone. The information relates to speed reductions, delay, and possible diversions. Drivers who traveled through the work zone when the VMS …

Analysis Of Traffic Accident Data In Kentucky (1990- 1994), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

This report includes an analysis of traffic accident data in Kentucky for the years of 1990-1994. A primary objective of this study was to determine average accident statistics for Kentucky highways. Average and critical numbers and rates of accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's procedure to identify locations that have abnormal rates or numbers of accidents.

Another objective of this study was to provide data which can be used in the preparation of the problem identification portion of Kentucky's Annual Highway Safety Plan. County and city …

Analysis Of Traffic Accident Data In Kentucky (1989-1993), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

This report includes an analysis of traffic accident data in Kentucky for the years of 1989-1993. A primary objective of this study was to determine average accident statistics for Kentucky highways. Average and critical numbers and rates of accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's procedure to identify locations that have abnormal rates or numbers of accidents.

Another objective of this study was to provide data which can be used in the preparation of the problem identification portion of Kentucky's Annual Highway Safety Plan. County and city …

Analysis Of Traffic Accident Data In Kentucky (1988-1992), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

This report includes an analysis of traffic accident data in Kentucky tor the years of 1988-1992. A primary objective of this study was to determine average accident statistics tor Kentucky highways. Average and critical numbers and rates at accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's procedure to identify locations that have abnormal rates or numbers of accidents.

Another objective of this study was to provide data which can be used in the preparation of the problem identification portion of Kentucky's Annual Highway Safety Plan. County and city …

Analysis Of Alcohol And Speed Related Traffic Accidents In Fayette County, Kenneth R. Agent

Kentucky Transportation Center Research Report

One objective of this study was to update the statistics related to alcohol-related accidents and arrests In Fayette County. The second objective was to include an analysis of speed-related accidents and citations.

The number of alcohol-related accidents in Fayette County has decreased over the past several years. The number of speed-related accidents has remained relatively constant Differences between the characteristics of all accidents and alcohol and speed-related accidents were noted. For example, there were higher percentages of alcohol and speed-related accidents involving a fixed object. Differences in driver characteristics, such as the high percentage of drivers in the 16 to …

Analysis Of Traffic Accident Data In Kentucky (1987-1991), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

This report includes an analysis of traffic accident data in Kentucky tor the years of 1987-1991. A primary objective of this study was to determine average accident statistics for Kentucky highways. Average and critical number and rates of accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's procedure to identify locations that have abnormal rates or numbers of accidents.

Another objective of this study was to provide data which can be used in the preparation of the problem identification portion of Kentucky's Annual Highway Safety Plan. County and city …

Analysis Of Traffic Accident Data In Kentucky (1986-1990), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

This report includes an analysis of traffic accident data in Kentucky for the years of 1986-1990. A primary objective of this study was to determine average accident statistics for Kentucky highways. Average and critical number and rates of accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's procedure to identify locations that have abnormal rates or numbers of accidents.

Another objective of this study was to provide data which can be used in the preparation of the problem identification portion of Kentucky's Annual Highway Safety Plan. County and city …

Analysis Of Traffic Accident Data In Kentucky (1985-1989), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

This report includes an analysis of traffic accident data in Kentucky for the years of 1985 through 1989. A primary objective of this study was to determine average accident statistics for Kentucky highways. Average and critical number and rates of accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's procedure to identify locations that have abnormal rates or numbers of accidents.

Another objective of this study was to provide data which can be used in the preparation of the problem identification portion of Kentucky's Annual Highway Safety Plan. County …

Analysis Of Accident Data In Kentucky (1984-1988), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

Kentucky has a systematic procedure to identify locations that have abnormal rates or numbers of accidents. This procedure utilizes average accident rates and numbers. A primary objective of this study was to determine average accident statistics in Kentucky. An annual safety program for Kentucky, which includes the identification, programming, budgeting, and evaluation of safety projects, is prepared each year. The data presented in this report may be included as the problem identification portion of Kentucky's Annual Highway Safety Plan.

Average and critical accident rates were calculated by highway type for rural and urban highways. A summary of results and recommendations …

Analysis Of Accident Data In Kentucky (1983-1987), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

Kentucky has a systematic procedure to identify locations that have abnormal rates or numbers of accidents. This procedure utilizes average accident rates and numbers. A primary objective of this study was to determine average accident statistics in Kentucky. An annual safety program for Kentucky, which includes the identification, programming, budgeting, and evaluation of safety projects, is prepared each year. The data presented in this report may be included as the problem identification portion of Kentucky's Annual Highway Safety Plan.

Average and critical accident rates were calculated by highway type for rural and urban highways. A summary of results and recommendations …

Analysis Of Accident Data In Kentucky (1982-1986), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

Kentucky has a systematic procedure to identify locations that have abnormal rates or numbers of accidents. This procedure utilizes average accident rates and numbers. A primary objective of this study was to determine average accident statistics in Kentucky. An annual safety program for Kentucky, which includes the identification, programming, budgeting, and evaluation of safety projects, is prepared each year. The data presented in this report may be included as the problem identification portion of Kentucky's Annual Highway Safety Plan.

Average and critical accident rates were calculated by highway type for rural and urban highways. A summary of results and recommendations …

Problem Identification For Highway Safety Plan, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

An annual highway safety program is proposed each year for the State of Kentucky in order to comply with Section 402, Title 23 of the United States Code. This program includes the identification, programming, budgeting, and evaluation of safety projects. This report is the sixth in a series of annual reports which have been prepared as the problem identification portion of Kentucky's Annual Highway Safety Plan.

In the past, the approach to problem identification has been to identify problem areas in the 18 highway safety program areas (standards). While the search for problems in each of these standard areas will …

Problem Identification For Highway Safety Plan (Fy 1984), Jerry G. Pigman, Kenneth R. Agent, Tom Creasey

Kentucky Transportation Center Research Report

An annual highway safety program is proposed each year for the State of Kentucky in order to comply with Section 402, Title 23 of the United States Code. This program includes the identification, programming, budgeting, and evaluation of safety projects. This report is the fifth in a series of annual reports which have been included as the problem identification portion of Kentucky's Annual Highway Safety Plan.

In the past, the approach to problem identification has been to identify problem areas in the 18 highway safety program areas (standards). While the search for problems in each of these standard areas will …

Problem Identification For Highway Safety Plan (Fy 1983), Kenneth R. Agent, Joseph D. Crabtree, Jerry G. Pigman

Kentucky Transportation Center Research Report

An annual highway safety program is proposed each year for the State of Kentucky in order to comply with Section 402, Title 23 of the United States code. This program includes the identification, programming, budgeting, and evaluation of safety projects. This report is the fourth in a series of annual reports which have been included as the problem identification portion of Kentucky's Annual Highway Safety Plan.

The approach used in this study involved identifying problem areas related to the 18 highway safety program standards with added emphasis placed on selected areas. This resulted in the analysis of 19 problem identification …

Transverse, Pavement Markings For Speed Control And Accident Reduction, Kenneth R. Agent

Kentucky Transportation Center Research Report

Transverse pavement markings were placed ahead of a sharp curve having a high-accident history. Speed and accident studies were conducted before and after. The markings were placed so that drivers otherwise failing to reduce speeds while approaching the curve would see transverse lines on the pavement at an increasing rate. The spacing of lines was intended to create an illusion of acceleration which would cause the driver to slow. The results indicated that pavement markings can be an effective speed-control measure and reduce accidents. At the single site studied, the obedience of drivers to this type of hazard warning was …

Effect Of Pavement Texture On Traffic Noise, Kenneth R. Agent, Charles V. Zegeer

Kentucky Transportation Center Research Report

Tire noise is one of the primary sources of highway noise, particularly at high speeds. Different types of road surfaces generate different noise levels. Noise data were collected on eight different surface types found in Kentucky. Noise measurements were made using a reference car, and noise recordings were obtained from the traffic stream. A reference truck was used for one test. It was found that portland cement concrete; Class I, Type A and A(Modified) bituminous concrete; chip seals; and open-graded, plant-mix seals were more or less "normal" surfaces in regard to generated noise. Sand-asphalt and Kentucky rock asphalt surfaces were …