Design Standards for Unobstructed Sight Lines at Left-turn Lanes

Design Standards for Unobstructed Sight Lines at Left-turn Lanes
Author: William F. Bremer
Publisher:
Total Pages: 93
Release: 2019
Genre: Left-turn lanes
ISBN:

Past research has clearly shown that obstructed sight lines at intersections lead to greater possibilities of collisions between left-turning vehicles and opposing oncoming vehicles. Evaluations of the effects of left-turn lane offsets, reported that positive left-turn lane offsets were more effective in reducing intersection left-turn crashes than zero and negative left-turn offsets. Several researchers have developed guidelines for geometric design elements of left-turn offset. The majority of states provide only a limited discussion on this topic. Florida DOT provides the most comprehensive policies and guidance for assuring unobstructed sight lines at left-turn lanes. Recommendations developed in this project center on general policies and guidance for designing offset left-turn lanes for a new edition of MnDOT’s Road Design Manual. Recommendations are organized to provide standards, policies, and guidance for new/reconstruction projects and for preservation projects. Topics covered include definition of left-turn lane offset, design factors impacting offset, suggested designs for urban and rural multilane roadways and expressways, accommodating U-turns, pedestrian and bicyclist considerations as well as winter maintenance considerations. Additional recommendations are offered to improve consistency among all MnDOT manuals and guides used for intersection design and operation.

Traffic Engineering Handbook

Traffic Engineering Handbook
Author: ITE (Institute of Transportation Engineers)
Publisher: John Wiley & Sons
Total Pages: 688
Release: 2016-01-26
Genre: Technology & Engineering
ISBN: 1118762304

Get a complete look into modern traffic engineering solutions Traffic Engineering Handbook, Seventh Edition is a newly revised text that builds upon the reputation as the go-to source of essential traffic engineering solutions that this book has maintained for the past 70 years. The updated content reflects changes in key industry standards, and shines a spotlight on the needs of all users, the design of context-sensitive roadways, and the development of more sustainable transportation solutions. Additionally, this resource features a new organizational structure that promotes a more functionally-driven, multimodal approach to planning, designing, and implementing transportation solutions. A branch of civil engineering, traffic engineering concerns the safe and efficient movement of people and goods along roadways. Traffic flow, road geometry, sidewalks, crosswalks, cycle facilities, shared lane markings, traffic signs, traffic lights, and more—all of these elements must be considered when designing public and private sector transportation solutions. Explore the fundamental concepts of traffic engineering as they relate to operation, design, and management Access updated content that reflects changes in key industry-leading resources, such as the Highway Capacity Manual (HCM), Manual on Uniform Traffic Control Devices (MUTCD), AASSHTO Policy on Geometric Design, Highway Safety Manual (HSM), and Americans with Disabilities Act Understand the current state of the traffic engineering field Leverage revised information that homes in on the key topics most relevant to traffic engineering in today's world, such as context-sensitive roadways and sustainable transportation solutions Traffic Engineering Handbook, Seventh Edition is an essential text for public and private sector transportation practitioners, transportation decision makers, public officials, and even upper-level undergraduate and graduate students who are studying transportation engineering.

Roundabouts

Roundabouts
Author: Lee August Rodegerdts
Publisher: Transportation Research Board
Total Pages: 407
Release: 2010
Genre: Technology & Engineering
ISBN: 0309155118

TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.

Roadside Design Guide

Roadside Design Guide
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Publisher:
Total Pages: 560
Release: 1989
Genre: Roads
ISBN:

A Policy on Geometric Design of Highways and Streets, 2018

A Policy on Geometric Design of Highways and Streets, 2018
Author:
Publisher:
Total Pages:
Release: 2018
Genre: Highway engineering
ISBN: 9781523119592

Highway engineers, as designers, strive to meet the needs of highway users while maintaining the integrity of the environment. Unique combinations of design controls and constraints that are often conflicting call for unique design solutions. A Policy on Geometric Design of Highways and Streets provides guidance based on established practices that are supplemented by recent research. This document is also intended as a comprehensive reference manual to assist in administrative, planning, and educational efforts pertaining to design formulation

Driver Expectancy in Highway Design and Traffic Operations

Driver Expectancy in Highway Design and Traffic Operations
Author: Gerson J. Alexander
Publisher:
Total Pages: 48
Release: 1986
Genre: Automobile driving
ISBN:

Expectancy relates to a driver's readiness to respond to situations, events, and information in predictable and successful ways. This report describes the concept of driver expectancy in the context of the driving task, and provides examples of expectancy and expectancy violations. It includes a procedure for identifying general and specific expectancy violations to enable engineers to develop remedial treatments to deal with expectancy problems.