Evaluation of Dynamic Message Signs and Their Potential Impact on Traffic Flow
Evaluation of Dynamic Message Signs and Their Potential Impact on Traffic Flow

Author: Ali Ebadollahzadeh Haghani

Publisher:

Published: 2013

Total Pages: 102

ISBN-13:

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Maryland State Highway Administration (SHA) has a rich data archive of the messages posted to the Dynamic Message Signs (DMS) and the time stamps when they were posted and taken down. The archive also contains traffic information surrounding the DMS signs, such as traffic volumes and speeds from various point or probe-based sensors. In this project, the research team used this data archive to study the impact of DMS messages on traffic conditions. Multiple Bluetooth sensors were deployed on a major travel corridor in the Baltimore Metropolitan Area to determine vehicle travel times and to monitor traffic diversions.

Use of Speed Monitoring and Communications Display for Traffic Control
Use of Speed Monitoring and Communications Display for Traffic Control

Author: Jon Michael Wertjes

Publisher: DIANE Publishing

Published: 1996

Total Pages: 59

ISBN-13: 0788144804

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A research report to identify or develop a speed monitoring display suitable for use in interstate highway work zones, & evaluate the display's effectiveness in reducing speeds in interstate work zones. A review of the literature & current practice was conducted to identify product availability & other state transportation use. Speed monitoring display alternatives were identified & evaluated according to essential requirements & project evaluation criteria. A lidar laser radar device was tested with a changeable message sign. The speed monitoring display was effective in reducing speeds higher than 70 mph.

Traffic Control Device Evaluation Program
Traffic Control Device Evaluation Program

Author: Adam Matthew Pike

Publisher:

Published: 2016

Total Pages: 109

ISBN-13:

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This report describes two research activities. One research study tested the effects of adding commercial logos acknowledging sponsorship to Changeable Message Signs. A driving simulator study was conducted using test signs with travel times and safety message both with and without logos, while complying with the Texas Manuals on Uniform Traffic Control Devices guidance regarding overall message length and phase timing. Measures of performance included eye gaze duration and last look distance as well as driving performance measures of speed limit compliance and lane maintenance. Forty-two drivers in old and young age groups participated int he study. Another research study evaluated various rumble strip alternatives that have been used on various roadways in Texas. In this study, vehicles were instrumented with specialized equipment to measure the sound and vibration of various rumble strip alternatives. The vehicles were driven at various speeds during the testing. The primary measure of effectiveness was the change in vibration and sound from the control condition of driving in the lane.