Author: Mark D. WooldridgePublisher:
ISBN:
Category : Low-volume roads
Languages : en
Pages : 110
Book Description
Design Guidelines for Passing Lanes on Two-lane Roadways (Super 2)
Author: Mark D. WooldridgePublisher:
ISBN:
Category : Low-volume roads
Languages : en
Pages : 110
Book Description
Human Factors Guidelines for Road Systems
Author: John L. CampbellPublisher: Transportation Research Board
ISBN: 0309154693
Category : Technology & Engineering
Languages : en
Pages : 111
Book Description
NCHRP report 600 explores human factors principles and findings for consideration by highway designers and traffic engineers. The report is designed to help the nonexpert in human factors to consider more effectively the roadway user's capabilities and limitations in the design and operation of highway facilities.
A Policy on Design Standards--interstate System
Author: Publisher: Aashto
ISBN:
Category : Express highways
Languages : en
Pages : 20
Book Description
Recent Roadway Geometric Design Research for Improved Safety and Operations
Author: Marcus BrewerPublisher: Transportation Research Board
ISBN: 0309223598
Category : Technology & Engineering
Languages : en
Pages : 90
Book Description
RB’s National Cooperative Highway Research Program (NCHRP) Synthesis 432: Recent Roadway Geometric Design Research for Improved Safety and Operations reviews and summarizes roadway geometric design literature completed and published from 2001 through early 2011, particularly research that identified impacts on safety and operations.
A Design Warrant for Auxiliary Passing Lanes on Rural Two-lane Highways
Author: Alan R. KaubPassing Manoeuvres and Passing Lanes
Author: Canada. Transport Canada. Surface. Road Safety. Traffic Safety Standards and Research BranchPublisher:
ISBN:
Category : Highway planning
Languages : en
Pages :
Book Description
Roadside Design Guide
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside SafetyPublisher:
ISBN:
Category : Roads
Languages : en
Pages : 560
Book Description
A Design Guide for Auxiliary Passing Lanes on Rural Two-lane Highways
Author: Alan R. KaubPublisher:
ISBN:
Category : Automobile driving
Languages : en
Pages : 37
Book Description
Strategies for Managing Increasing Truck Traffic
Author: James G. DouglasPublisher: Transportation Research Board
ISBN: 0309069580
Category : Traffic engineering
Languages : en
Pages : 92
Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 314: Strategies for Managing Increasing Truck Traffic documents recent efforts by transportation organizations that construct, operate, and manage the transportation system and identifies truck-related challenges, planning activities for goods movement being undertaken, truck management strategies being considered, factors that have influenced the selection of particular strategies, and benefits expected from selected strategies.
Guidelines for Free Right-turn Lanes at Unsignalized Intersections on Rural Two-lane Highways
Author: Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 128
Book Description
Free right-turn (FRT) lanes are turning roadways at intersections that provide for free-flowing right-turn movements. The objective of the research presented in this report was to develop guidelines for FRT lanes at unsignalized intersections on rural two-lane highways in Nebraska. The development of the guidelines was based on a benefit-cost analysis, which determined the right-turn volumes required to justify the construction and maintenance of FRT lanes at these locations. The research involved the evaluation of the operational and safety effects of FRT lanes. The operational effects of FRT lanes were analyzed using kinematic and traffic flow models. Accident data analysis, field studies, and computer simulation of truck dynamics were used to evaluate the safety effects of FRT lanes. The results of these analyses were also used to determine acceptable design criteria for FRT lanes. A survey of other state agencies was conducted to identify any existing guidelines, design criteria, and experience that might be useful in developing the guidelines and evaluating the design criteria. Also, the concerns of citizens opposed to the removal of FRT lanes were examined in an effort to develop guidelines that might effectively address these concerns. The results of the research indicate that design-year right-turn AADTs ranging from 440 to 825 vehicles per day, depending on the percentage of trucks, are required to warrant a FRT lane at an unsignalized intersection of rural two-lane highways. A design speed of 40 mph was found to be a realistic design speed and the most cost-effective design speed for FRT lanes. However, design speeds up to 55 mph do not significantly reduce the cost effectiveness of a FRT lane. The AASHTO design criteria for curves on open highways were found to be appropriate for designing the curvature of FRT lanes. The AASHTO criteria for minimum-radii intersection curves were not acceptable. Also, acceleration lanes were found to improve the safety of the merging operations associated with FRT lanes. The results of the accident data analysis do not support the perceptions of concerned citizens regarding the safety benefits of FRT lanes. FRT lanes were not found to affect the frequency, severity, or types of accidents that occur at unsignalized intersections on rural two-lane highways. Thus, FRT lanes should not be perceived, or promoted, as traffic safety improvements. The benefits of FRT lanes are limited to improving the efficiency of right-turn movements.