00804647

Component

https://doi.org/10.3141/1737-06

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

Design consistency refers to highway geometry's conformance with driver expectancy. Generally, drivers make fewer errors at geometric features that conform with their expectations. A proposed method for evaluating design consistency is to predict the speed along an alignment by using a speed-profile model. A speed-profile model was developed by using the following: speed prediction equations that calculate the expected speed at horizontal, vertical, or combination curves; assumed desired speed for the roadway; TWOPAS equations that determine the performance-limited speeds at every point; acceleration and deceleration rates; and several documented assumptions. The speed-profile model can be used to evaluate the design consistency of a facility or to generate a speed profile along an alignment. In conclusion, the speed-profile model developed appears to provide a suitable basis for the IHSDM (Interactive Highway Safety Design Model) design consistency module.

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

English

p. 42-49

2000

Transportation Research Record

0309067405

Figures (4) ; References (6) ; Tables (4)

Acceleration (Mechanics); Deceleration; Equations; Geometric design; Highway design; Mathematical models; Mathematical prediction; Rural highways; Speed; Two lane highways

IHSDM (Computer model); TWOPAS (Computer model)

Design consistency; Speed profile

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
• PREDICTING OPERATING SPEEDS ON TANGENT SECTIONS OF 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