Crash Tests of Work Zone Traffic Control Devices
Crash Tests of Work Zone Traffic Control Devices

Author: James E. Bryden

Publisher:

Published: 1990

Total Pages: 52

ISBN-13:

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Full-scale vehicle crash tests evaluated performance of typical work zone traffic control devices. Modified test procedures and evaluation criteria from NCHRP Report 230 were used in 108 tests, providing significant insight into impact performance. Plastic drums used as channelizing devices, cones, tubes, and vertical panels performed well in most tests, presenting no hazards in terms of passenger compartment intrusion, interference with vehicle control, or threat to workers and other traffic from impact debris.

Traffic Control Device Analysis, Testing, and Evaluation Program
Traffic Control Device Analysis, Testing, and Evaluation Program

Author: Melisa Dayle Finley

Publisher:

Published: 2021

Total Pages: 0

ISBN-13:

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This project provides the Texas Department of Transportation with a mechanism to conduct high-priority, limited-scope evaluations of traffic control devices. Work conducted and concluded during the 2020 fiscal year included: (1) review of retroreflective raised pavement marker practices; (2) review of optical speed bar practices in horizontal curves; (3) review of traffic signal head backplate practices; (4) review of intersection conflict warning system practices; (5) development of guidance for the application of 6-inch pavement markings; (6) assessment of the effectiveness of work zone signing; and (7) assessment of the effectiveness of pedestrian crossing treatments at night.

Traffic Control Device Analysis, Testing, and Evaluation Program
Traffic Control Device Analysis, Testing, and Evaluation Program

Author: Melisa Dayle Finley

Publisher:

Published: 2019

Total Pages: 127

ISBN-13:

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This project provides the Texas Department of Transportation with a mechanism to conduct high-priority, limited-scope evaluations of traffic control devices. Work conducted during the 2018 fiscal year included: Evaluation of the safety of wet-weather pavement markings, Identification of effective work zone pavement marking removal techniques, review of raised retro reflective pavement marker practices in other states, identification of current uses and effectiveness of safety corridors, hosting of a wrong-way driving forum, assessment of pedestrian crashes on freeways and high-speed arterials, review of the design and application of lane control signs on frontage roads, review of the application of embedded light-emitting diodes in signs.

Improving Traffic Control Effectiveness in Complex Work Zones
Improving Traffic Control Effectiveness in Complex Work Zones

Author: Gerald L. Ullman

Publisher:

Published: 2003

Total Pages: 46

ISBN-13:

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Information from driver studies performed during the first year of the project identified several features and conditions that created confusion and anxiety in traversing the work zone. Many of these conditions represented deficiencies in the work zone traffic control from the standpoint of positive guidance principles. This report describes the efforts to tailor the application of positive guidance procedures to work zone traffic control installations reviews. Four key steps, hazard visibility assessment, expectancy violation determination, information load analysis, and information needs specification, are described in the context of traffic control at potentially complex work zones. A methodology is presented for applying these steps in a field review process to be performed as part of the work zone traffic control installation process.

Improving Traffic Flow Conditions for Interstate Work-zones
Improving Traffic Flow Conditions for Interstate Work-zones

Author: Nawaz M. Shaik

Publisher:

Published: 2005

Total Pages:

ISBN-13:

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Highway departments, which are responsible for maintenance of different highway facilities, have the continuing responsibility to make the highway as safe and efficient as possible. Traffic control approaching and within a work-zone is a major concern for these departments. The objective of this study was to test three traffic control devices white lane drop arrows, orange rumble strips, and the CB wizard alert system for their effectiveness in improving merging, and reducing speed and speed variance at an interstate highway work-zone in Missouri. Statistical tests were conducted on the speed related data collected along the approach to the work-zone lane closure when the devices were not in place and when they were in place. Results of implementing the white lane drop arrows and the CB wizard alert system indicate decreases in the percentage of vehicles in the closed lane, mean speed and speed variance. It also appears that the CB wizard alert system may be more effective than the white lane drop arrows. The CB wizard alert system in conjunction with the orange rumble strips did show similar reductions, but they were much smaller in comparison to the CB wizard alert system alone.