00756137

Component

https://doi.org/10.3141/1635-07

http://scholar.google.com...Wang&publication_year=1998

The effects on future data analysis capabilities and results should states convert to a towaway and above crash-reporting threshold are quantified. The results from the four states used in the analysis (Illinois, Michigan, Minnesota, and North Carolina) revealed that only 51.7% of the crash data would be included using a towaway threshold. Only 33.7% would be included using an injury threshold. In general, a towaway threshold would exclude more crashes on urban streets than on rural roads. For most road classes, 40% to 60% of crashes would be excluded. A towaway threshold would result in greatly underestimating the occurrence of certain crash types, particularly rear-end, sideswipe, parking, and animal crashes. Run-off-road and angle/turning crashes would also be affected considerably. Using a towaway criterion will seriously affect researchers' ability to conduct meaningful evaluations of roadside appurtenances, such as guardrail, breakaway signs and poles, crash cushions, and various median treatments. For most vehicle types, only 30% to 60% of crashes would be included under a towaway threshold. Technological, institutional, and organizational strategies for improving crash reporting thresholds are suggested.

This paper appears in Transportation Research Record No. 1635, Safety Analysis Related to Highway Design, Crash Costs, and Traffic Records Systems; Methodologies for Evaluating Safety Improvements.

English

p. 49-57

1998

Transportation Research Record

0309065070

Figures (6) ; References (3) ; Tables (1)

Crash analysis; Crash reports; Crash types; Impact studies; Traffic crashes

Thresholds

Highways; Safety and Human Factors; I81: Accident Statistics

TRIS, TRB, ATRI

Nov 9 1998 12:00AM

• ACCIDENT MODELS FOR TWO-LANE RURAL SEGMENTS AND INTERSECTIONS
• ALLOCATING THE COSTS OF MOTOR VEHICLE CRASHES BETWEEN VEHICLE TYPES
• APPLYING THE ORDERED PROBIT MODEL TO INJURY SEVERITY IN TRUCK-PASSENGER CAR REAR-END COLLISIONS
• CONFLICT ANALYSIS FOR DOUBLE LEFT-TURN LANES WITH PROTECTED-PLUS-PERMITTED SIGNAL PHASES
• CONSIDERATION OF BOLLARD TREATMENT AT EXIT GORE AREAS
• DEVELOPMENT OF EXPECTED CONFLICT VALUE TABLES FOR UNSIGNALIZED THREE-LEGGED INTERSECTIONS
• DEVELOPMENT OF SAFETY-BASED LEVEL-OF-SERVICE PARAMETERS FOR TWO-WAY STOP-CONTROLLED INTERSECTIONS
• DISAGGREGATE SAFETY PERFORMANCE MODELS FOR SIGNALIZED INTERSECTIONS ON ONTARIO PROVINCIAL ROADS
• EFFECT OF ENVIRONMENTAL FACTORS ON DRIVER SPEED: A CASE STUDY
• EVALUATING MEDIAN CROSSOVER LIKELIHOODS WITH CLUSTERED ACCIDENT COUNTS: AN EMPIRICAL INQUIRY USING THE RANDOM EFFECTS NEGATIVE BINOMIAL MODEL
• EXPLORATORY MULTIVARIABLE ANALYSES OF CALIFORNIA DRIVER RECORD ACCIDENT RATES
• INVESTIGATION OF NATIONAL HIGHWAY SYSTEM ROADWAYS IN THE HIGHWAY SAFETY INFORMATION SYSTEM STATES
• INVESTIGATION OF THE EFFECTIVENESS OF BOULEVARD ROADWAYS
• POLICE REPORTING OF PEDESTRIANS AND BICYCLISTS TREATED IN HOSPITAL EMERGENCY ROOMS
• PREDICTING VEHICLE OCCUPANCIES FROM ACCIDENT DATA: AN ACCIDENT SEVERITY APPROACH
• PREDICTION MODELS FOR TRUCK ACCIDENTS AT FREEWAY RAMPS IN WASHINGTON STATE USING REGRESSION AND ARTIFICIAL INTELLIGENCE TECHNIQUES
• SAFETY BENEFITS OF SPIRAL TRANSITIONS ON HORIZONTAL CURVES ON TWO-LANE RURAL ROADS
• SAFETY EVALUATION OF ALTERNATIVE SIGNAL HEAD DESIGN
• SEASONAL VARIATIONS IN THE AGE-RELATED COLLISION RISK OF ONTARIO DRIVERS
• SPOT SPEED ANALYSIS ON URBAN ROADS IN RIYADH
• TWO PROBLEMS OF AVERAGING ARISING IN THE ESTIMATION OF THE RELATIONSHIP BETWEEN ACCIDENTS AND TRAFFIC FLOW