00804648

Component

https://doi.org/10.3141/1737-07

http://scholar.google.com...mbro&publication_year=2000

Prediction and estimation of speeds on two-lane rural highways are of enormous significance to planners and designers. Estimation of speeds on curves may be easier than prediction of speeds on tangent sections because of the strong correlation of speeds with a few defined and limiting variables, such as curvature, superelevation, and the side-friction coefficients between road surface and tires. On tangent sections, however, the speed of vehicles is dependent on a wide array of roadway characteristics, such as the length of the tangent section, the radius of the curve before and after the section, cross-section elements, vertical alignment, general terrain, and available sight distance. Few studies have dealt with this issue because a considerable database is necessary to identify any significant trends and substantial modeling effort is required. Research analyzed the variability of the operating speeds on 162 tangent sections of two-lane rural highways, and models were developed for prediction of operating speed based on the geometric characteristics available. A one-model approach was used initially. Because of the low R-squared values, a family of models was developed that better predicted operating speeds.

This paper appears in Transportation Research Record No. 1737, Geometric Design and Effects on Traffic Operations 2000.

English

p. 50-57

2000

Transportation Research Record

0309067405

Figures (7) ; References (19)

Geometric design; Mathematical models; Mathematical prediction; Operating speed; Rural highways; Two lane highways; Variables

Tangent sections

Data and Information Technology; Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure

TRIS, TRB, ATRI

Jan 11 2001 12:00AM

• ACCELERATION CHARACTERISTICS OF STARTING VEHICLES
• ANALYZING INFLUENCE OF GEOMETRIC DESIGN ON OPERATING SPEEDS ALONG LOW-SPEED URBAN STREETS: MIXED-MODEL APPROACH
• BENEFITS OF SPLIT INTERSECTIONS
• DESIGN OF ROUNDABOUTS IN FRANCE: HISTORICAL CONTEXT AND STATE OF THE ART
• EFFECTS OF HORIZONTAL CURVATURE ON DRIVER VISUAL DEMAND
• EFFECTS OF RIGHT-TURN LANES ON DRIVEWAY SIGHT DISTANCE
• EVALUATING HORIZONTAL ALIGNMENT DESIGN CONSISTENCY OF TWO-LANE RURAL HIGHWAYS: DEVELOPMENT OF NEW PROCEDURE
• KINEMATIC APPROACH TO HORIZONTAL CURVE TRANSITION DESIGN
• SPEED-PROFILE MODEL FOR TWO-LANE RURAL HIGHWAYS
• TURN LANE STORAGE LENGTH DESIGN: THEORY FOR THE PRACTITIONER
• UTILIZATION OF AUXILIARY THROUGH LANES AT INTERSECTIONS OF FOUR-LANE, TWO-WAY ROADWAYS