Evaluation of Traffic Control Devices for Rural High-speed Maintenance Work Zones

Evaluation of Traffic Control Devices for Rural High-speed Maintenance Work Zones PDF Author: Paul John Carlson
Publisher:
ISBN:
Category : Road construction workers
Languages : en
Pages : 114

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Evaluation of Traffic Control Devices for Rural High-speed Maintenance Work Zones

Evaluation of Traffic Control Devices for Rural High-speed Maintenance Work Zones PDF Author: Paul John Carlson
Publisher:
ISBN:
Category : Road construction workers
Languages : en
Pages : 114

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Book Description


Traffic Flow and Safety in Work Zones, Signing and Marking Materials

Traffic Flow and Safety in Work Zones, Signing and Marking Materials PDF Author:
Publisher:
ISBN:
Category : Road markings
Languages : en
Pages : 90

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Guidelines for Design and Operation of Nighttime Traffic Control for Highway Maintenance and Construction

Guidelines for Design and Operation of Nighttime Traffic Control for Highway Maintenance and Construction PDF Author: James E. Bryden
Publisher: Transportation Research Board
ISBN: 0309067650
Category : Automobile driving at night
Languages : en
Pages : 131

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Roadside Design Guide

Roadside Design Guide PDF Author:
Publisher: Amer Assn of State Hwy
ISBN: 9781560510314
Category : Bridge railings
Languages : en
Pages : 352

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Book Description
This document presents a synthesis of current information and operating practices related to roadside safety and is developed in metric units. The roadside is defined as that area beyond the traveled way (driving lanes) and the shoulder (if any) of the roadway itself. The focus of this guide is on safety treatments that minimize the likelihood of serious injuries when a driver runs off the road. This guide replaces the 1989 AASHTO "Roadside Design Guide."

Evaluation of the Late Merge Work Zone Traffic Control Strategy

Evaluation of the Late Merge Work Zone Traffic Control Strategy PDF Author: Andrew G. Beacher
Publisher:
ISBN:
Category : Road work zones
Languages : en
Pages : 76

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Book Description
Several alternative lane merge strategies have been proposed in recent years to process vehicles through work zone lane closures more safely and efficiently. Among these is the late merge. With the late merge, drivers are instructed to use all lanes to the merge point and then take turns proceeding through the work zone. Its efficiency has been tested on only a limited basis. The purpose of this project was to determine when, if at all, deployment of the late merge was beneficial. The late merge concept was evaluated by comparing it to the traditional merge using computer simulations and field evaluations. Computer simulations included analysis of 2-to-1, 3-to-1, and 3-to-2 lane closure configurations to determine its impact on throughput and the impact of factors such as free flow speed, demand volume, and percentage of heavy vehicles. Field tests were limited to 2-to-1 lane closures, as recommended by state transportation officials, and examined the impact of treatment type on vehicle throughput, percentage of vehicles in the closed lane, and time in queue. Results of the computer simulations showed the late merge produced a statistically significant increase in throughput volume for only the 3-to-1-lane closure configuration and was beneficial across all factors for this type of closure. For the 2-to-1 and 3-to-2 lane closure configurations, the late merge increased throughput when the percentage of heavy vehicles was large. Field tests showed similar trends with regard to throughput. Although throughput increased, the increase was not statistically significant because of the limited number of heavy vehicles at the site. More drivers were in the closed lane, indicating a response to the late merge signs. Time in queue was also reduced, although the reductions were not statistically significant. The authors conclude that the late merge should be considered for 3-to-1 lane closure configurations but not until a sound methodology for deployment has been developed and tested in the field. For the 2-to-1 and 3-to-2 configurations, the late merge should be implemented only when the percentage of heavy vehicles is at least 20 percent.

FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1991

FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1991 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 108

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Changeable Message Signs

Changeable Message Signs PDF Author: Conrad L. Dudek
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 68

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Book Description
"This synthesis will be of interest to traffic engineers in federal, state, provincial, and local transportation agencies who are responsible for the design and operation of safe and efficiency highway systems. It will also be useful to consulting traffic engineers, sign manufacturers, and vendors in the private sector who assist governmental clients in the application of changeable message sign (CMS) and other intelligent transportation systems (ITS) technology. It is an update of NCHRP Synthesis no. 61 (1979)."--Avant-propos.

Human Factors in Transportation

Human Factors in Transportation PDF Author: Gesa Praetorius, Charlott Sellberg and Riccardo Patriarca
Publisher: AHFE International
ISBN: 1958651710
Category : Technology & Engineering
Languages : en
Pages : 770

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Book Description
Proceedings of the 14th International Conference on Applied Human Factors and Ergonomics (AHFE 2023), July 20–24, 2023, San Francisco, USA

A Highway Work Zone Design and Traffic Management Decision System

A Highway Work Zone Design and Traffic Management Decision System PDF Author: Yali Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 272

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Book Description


Long-term Pavement Marking Practices

Long-term Pavement Marking Practices PDF Author: James Migletz
Publisher: Transportation Research Board
ISBN: 0309069246
Category : Road markings
Languages : en
Pages : 165

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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 306: Long-Term Pavement Marking Practices documents the current and best practices for managing pavement marking systems, identifies future needs, and addresses driver needs and methods of communicating information to drivers, selection criteria (e.g., reflectivity, pavement service life, wet weather performance), materials (e.g., color, durability, cost), specifications, construction practices, inventory management systems, and more.