00812415

Component

http://onlinepubs.trb.org.../circulars/ec019/ec019.pdf

In recent years, many traffic engineers have advocated converting four-lane undivided urban streets to three-lane two-way left-turn facilities. A number of these conversions have been successfully implemented. Accident rates have decreased while corridor and intersection levels of service remained acceptable. This conversion concept is yet another viable alternative "tool" to place in our urban safety/congestion toolbox.

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

00812391

E-C019,
Paper A-1
Paper A-2

English

12 p.

2000-12

Transportation Research Circular

Figures (4) ; Photos (2) ; References (10) ; Tables (5)

Crash rates; Four lane highways; Highway safety; Level of service; Three lane highways; Traffic congestion; Two way left turn lanes

Design; Highways; Operations and Traffic Management; Planning and Forecasting; Safety and Human Factors; I21: Planning of Transport Infrastructure; I73: Traffic Control; I82: Accidents and Transport Infrastructure

TRIS, TRB

Jun 5 2001 12:00AM

• A PRACTITIONER'S PERSPECTIVE ON FLEXIBLE DESIGN
• ACCESS SPACING AND ACCIDENTS: A CONCEPTUAL ANALYSIS
• ACCESS SPACING AND TRAFFIC SAFETY
• APPLICATION OF ROAD SAFETY AUDITS TO URBAN STREETS
• ARTERIAL SPEED CALMING: MOHAWK ROAD CASE STUDY
• CALMING NEW YORK CITY INTERSECTIONS
• CITIZEN TRANSPORTATION PLANNING: A WORKING MODEL
• CONTINUOUS SPEED MEASUREMENT OF INDIVIDUAL DRIVERS ON SUBURBAN ARTERIALS
• CURB PARKING FINDINGS REVISITED
• DESIGN CONSIDERATIONS FOR EXISTING UTILITY POLES IN URBAN AREAS
• DESIGNING FUNCTIONAL STREETS THAT CONTRIBUTE TO OUR QUALITY OF LIFE
• DEVELOPING STREET STANDARDS THAT ALLOW FLEXIBILITY
• DOWNTOWN STREETS: ARE WE STRANGLING OURSELVES IN ONE-WAY NETWORKS?
• DRIVEWAY SPACING AND TRAFFIC OPERATIONS
• ECONOMIC IMPACTS OR RAISED MEDIANS ON ADJACENT BUSINESSES
• IMPACTS OF TRAFFIC CALMING
• LINKING LAND USE AND TRANSPORTATION THROUGH STREET DESIGN
• MOBILITY-FRIENDLY STREET STANDARDS FOR DELAWARE
• NEOTRADITIONAL DESIGN: MOBILITY FOR ALL AGES
• PEDESTRIAN LEVEL OF SERVICE BASED ON TRIP QUALITY
• PLANNING AND DESIGN OF A SUBURBAN NEOTRADITIONAL NEIGHBORHOOD
• PREDICTING ANNUAL INTERSECTION ACCIDENTS WITH CONFLICT OPPORTUNITIES
• PUBLIC INVOLVEMENT IN MEDIAN PROJECTS
• PUBLIC PERCEPTION OF MEDIAN TREATMENT FOR DEVELOPED URBAN ROADS
• QUESTIONABLE CONCEPTS IN NEOTRADITIONAL SUBDIVISION DESIGN
• RIGHT-TURN TREATMENT FOR SIGNALIZED INTERSECTIONS
• SPEED MANAGEMENT TECHNIQUES FOR COLLECTORS AND ARTERIALS
• SPEED PROFILES: A METHOD FOR ANALYZING SPEED ADAPTATION BY CAR DRIVERS
• STREET DESIGN GUIDELINES FOR HEALTHY NEIGHBORHOODS
• STREET SPACING AND SCALE
• THE SPLIT INTERSECTION: A SOLUTION FOR A CONGESTED INTERSECTION
• UNCONVENTIONAL LEFT-TURN ALTERNATIVES FOR URBAN AND SUBURBAN ARTERIALS: AN UPDATE
• URBAN ROADWAY CLASSIFICATION: BEFORE THE DESIGN BEGINS
• URBAN STREET CROSS SECTION AND SPEED ISSUES
• WEST PALM BEACH TRAFFIC CALMING: THE SECOND GENERATION