00634576

Component

http://onlinepubs.trb.org...trr/1993/1385/1385-020.pdf

https://scholar.google.co...n+Jr&publication_year=1993

Ramps consist of three components: two terminal ends and a connecting roadway. The terminals can be designed as high-speed transitions between higher-function roadways or as at-grade intersections. At-grade terminal designs may be applicable at both ends of a ramp. Decisions regarding the appropriate type of terminal design are affected by the functional classification of the intersecting roadways. When an at-grade intersection is chosen as the ramp terminal design, all related controls and criteria should be based on the information presented in Chapter IX of the 1990 AASHTO geometric design policy. Operationally, when an at-grade intersection is used as the terminal, the traffic capacity analyses should be based on the intersection capacity procedures outlined in the 1985 Highway Capacity Manual. It is suggested that AASHTO geometric design policy emphasize the appropriateness of at-grade intersections as ramp terminals. The use of functional classification and the high-speed and low-speed design criteria for at-grade ramp terminal designs is illustrated and clarified.

This paper appears in Transportation Research Record No. 1385, Intersection and Interchange Design. 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

01403217

English

p. 155-161

1993

Transportation Research Record

0309054567

Figures (1) ; References (11) ; Tables (2)

Classification; Geometric design; Highway capacity; Highway design; Highways; Interchange ramps; Interchanges; Interchanges and intersections; Intersections

Highway classification

Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure

TRIS, TRB, ATRI

Aug 30 1993 12:00AM

• ACCESS CONTROL ISSUES RELATED TO URBAN ARTERIAL INTERSECTION DESIGN
• ACCIDENTS AND SAFETY ASSOCIATED WITH INTERCHANGES
• COMPARISON OF SIGHT DISTANCE PROCEDURES FOR TURNING VEHICLES FROM A STOP-CONTROLLED APPROACH
• COORDINATION OF BASIC INTERSECTION DESIGN ELEMENTS: AN OVERVIEW
• FREEWAY AND INTERCHANGE DESIGN: A HISTORICAL PERSPECTIVE
• GEOMETRIC DESIGN FEATURES OF SINGLE-POINT URBAN INTERCHANGES
• GEOMETRIC DESIGN OF METERED ENTRANCE AND HIGH-OCCUPANCY VEHICLE BYPASS RAMPS
• GRADE-SEPARATED INTERSECTIONS
• HUMAN FACTORS ASSOCIATED WITH INTERCHANGE DESIGN FEATURES
• INTERCHANGE PLANNING AND DESIGN--AN INTERNATIONAL PERSPECTIVE
• INTERCHANGE RAMP GEOMETRICS--ALIGNMENT AND SUPERELEVATION DESIGN
• INTERCHANGE STUDY AND SELECTION PROCESS
• INTERSECTION DESIGN CONSIDERATIONS TO ACCOMMODATE LARGE TRUCKS
• LENGTHS OF LEFT-TURN LANES AT SIGNALIZED INTERSECTIONS
• OPERATIONAL CONSIDERATIONS FOR SYSTEMS OF INTERCHANGES
• RAMP EXIT/ENTRANCE DESIGN--TAPER VERSUS PARALLEL AND CRITICAL DIMENSIONS
• RAMP/MAINLINE SPEED RELATIONSHIPS AND DESIGN CONSIDERATIONS
• SAFE ACCOMMODATION OF PEDESTRIANS AT INTERSECTIONS
• SAFETY IMPROVEMENTS AT INTERSECTIONS ON RURAL EXPRESSWAYS: A SURVEY OF STATE DEPARTMENTS OF TRANSPORTATION
• TWO-LANE LOOP RAMPS: OPERATION AND DESIGN CONSIDERATIONS