00818862

Component

https://doi.org/10.3141/1751-06

http://scholar.google.com...adou&publication_year=2001

In the design consistency literature, the development of speed prediction models has concentrated on passenger cars, with little attention given to truck speed models. On some two-lane rural highways, however, trucks represent a large enough percentage of vehicles that they may be considered the design vehicle. The objective of the study was to develop operating speed prediction models for trucks on two-lane rural highways. A series of regression models was developed using a combination of field data and simulated data. First, the "Traffic on Rural Roads" and "Two-Lane with Passing" (TWOPAS) simulation models were critically assessed, and TWOPAS was selected to be used in further analysis. Next, field data from 17 sites were used to evaluate TWOPAS's capability in the prediction of passenger car speeds and truck speeds. On the basis of the results of this evaluation, 13 sites were selected for use in simulating truck operating speeds. These sites were used to generate additional speed data for inclusion in the database for model development. Finally, a series of regression models was developed to predict 85th percentile truck operating speeds upstream, along, and downstream of a horizontal curve. These models consider the effect of length and grade of approach tangent, horizontal curve radius, and length and grade of departure tangent.

This paper appears in Transportation Research Record No. 1751, Geometric Design and the Effects on Traffic Operations 2001.

English

p. 44-55

2001

Transportation Research Record

0309072123

Figures (4) ; References (12) ; Tables (8)

Mathematical prediction; Operating speed; Regression analysis; Rural highways; Simulation; Trucks; Two lane highways

Field data; Horizontal curvature

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

TRIS, TRB, ATRI

Oct 18 2001 12:00AM

• APPLICATION OF ARTIFICIAL NEURAL NETWORKS TO PREDICT SPEEDS ON TWO-LANE RURAL HIGHWAYS
• CONTROLS FOR HORIZONTAL CURVE DESIGN
• DESIGN FACTORS THAT AFFECT DRIVER SPEED ON SUBURBAN STREETS
• GEOMETRIC DESIGN AND SAFETY ASPECTS OF ROUNDABOUTS
• GUIDELINES FOR OPPOSING LEFT-TURN LANE-LINE WIDTHS
• OPERATING SPEED PREDICTION ON CREST VERTICAL CURVES OF RURAL TWO-LANE HIGHWAYS IN NEBRASKA
• OPERATIONAL EVALUATION OF FREEWAY RAMP DESIGN
• SAFETY EFFECT OF ROUNDABOUT CONVERSIONS IN THE UNITED STATES: EMPIRICAL BAYES OBSERVATIONAL BEFORE-AFTER STUDY
• SPEED BEHAVIOR ANALYSIS AT CURVED RAMP SECTIONS OF MINOR INTERCHANGES
• TRAVEL TIME COMPARISONS BETWEEN SEVEN UNCONVENTIONAL ARTERIAL INTERSECTION DESIGNS