00983189

Component

https://doi.org/10.3141/1881-07

http://scholar.google.com...Cava&publication_year=2004

More than 50% of traffic fatalities occur on two-lane rural roads, and more than half of these fatalities occur on curved roadway sections. A large body of research can be used to analyze and evaluate the fundamental relationships between accident situation, highway geometric design, driving behavior, and driving dynamics. These factors form the basis for the development of three quantitative safety criteria used to evaluate the hazards of two-lane rural roads with respect to new designs; redesigns; restoration, rehabilitation, or resurfacing projects; and existing alignments. The safety criteria support the design engineer in classifying new or old roadway sections according to good (sound), fair (tolerable), and poor (dangerous) design practices. On the basis of observation of the actual variation in the accident rate with respect to road alignment, a fuzzy model was developed to classify roadway elements by using these safety criteria to obtain a more careful evaluation of highway design inconsistencies. For each criterion, the inconsistencies were included in three fuzzy sets (good, fair, poor) with differing degrees of membership. By defining linear membership functions, it was possible to obtain good results to classify road sections and then to determine a prioritization scale of maintenance interventions. The procedure can be applied to large databases of road networks to identify the more dangerous design elements that need interventions to improve highway safety and to allocate resources under limited budget conditions.

This paper appears in Transportation Research Record No. 1881, Geometric Design and the Effects on Traffic Operations 2004.

00983182

English

p. 54-62

2004

Transportation Research Record

0309094771

Figures (5) ; References (11) ; Tables (5)

Alignment; Crash rates; Fuzzy sets; Geometric design; Highway design; Highway maintenance; Highway safety; Resource allocation; Rural highways; Strategic planning; Two lane highways

Fuzzy models; Intervention

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

TRIS, TRB, ATRI

Dec 2 2004 12:00AM

• BASIS OF THE SWISS DESIGN STANDARD FOR ROUNDABOUTS
• DESIGN AND OPERATIONAL PERFORMANCE OF CROSSOVER DISPLACED LEFT-TURN INTERSECTIONS
• DETERMINING CRITICAL LENGTH OF GRADE FOR GEOMETRIC DESIGN OF VERTICAL ALIGNMENTS
• DEVELOPMENT OF THE DISPLACED RIGHT-TURN INTERSECTION
• GEOMETRIC MODELS TO CALCULATE INTERSECTION SIGHT DISTANCE FOR UNPROTECTED LEFT-TURN TRAFFIC
• HIGHWAY DESIGN CONSISTENCY: REFINING THE STATE OF KNOWLEDGE AND PRACTICE
• INFLUENCE OF SPEEDS ON DESIGN STANDARDS IN SWITZERLAND
• LENGTHS OF DOUBLE OR DUAL LEFT-TURN LANES