Engineering Commons^™

Preferences For Permitted And Protected Left-Turn Signal Displays, Alexander Drakopoulos, Richard W. Lyles

Civil and Environmental Engineering Faculty Research and Publications

Twenty-two different signal displays for permitted and protected left turns were evaluated from a driver comprehension perspective. The objective was to identify which alternate signal displays used to convey the same left-turn message to the driver are better comprehended and therefore recommended for use in the field. Protected displays compliant with the Manual on Uniform Traffic Control Devices were found to be better comprehended than certain noncompliant displays; however, some noncompliant permitted displays were found to outperform their compliant counterparts. Regional comprehension biases are nonexistent for the most part, regardless of display compliance with the Manual on Uniform Traffic Control …

Investigative Study Of The Italgrip System - Noise Analysis, David Kuemmel, John Jaeckel, Alex Satanovsky

Transportation Research Center: Noise & Texture Studies

The purpose of this study was to determine if Italgrip is a suitable technique to increase the safety and quality of Wisconsin roadways. The objective of this noise analysis is to identify and quantify any exterior noise impacts of the Italgrip anti-skid surface treatment on PCC pavements. Italgrip is a very thin surface treatment consisting of a two-part polymer resin placed on pavement and covered with re-worked steel slag. Although widely used in Italy, Italgrip has only been available in the United States since 1999.

This study analyzes comparative data from three types of pavement surfaces: untreated transverse tined PCC …