Traffic Safety Flashcards
(20 cards)
Reason collisions are not reported
Higher crash threshold
Goal of Model Minimum Uniform Crash Criteria (MMUCC)?
Standardizing collection crash data
Goal of the Model Minimum Inventory of Roadway Elements (MMIRE)
Provide guidance on what roadway inventory and traffic elements should be included in crash analysis
Sites With Promise
Seeks to find fixable sites, not necessary sites most hazardous
Reduces data collection burden on analyst
Five conditions (A-E) for choosing promising sites
How many conditions does Sites With Promise (SWP) method consider in crash analysis?
Five
Condition Diagram
Scale drawing of location of interest
Can be produced with aerial photos and online mapping tools
Shows layout, lane width
Road Safety Audit
Formal safety evaluation of future or existing roadway by independent audit team
Can be used in any phase of project management
Includes positive guidance review, driver behavior observation, human factors review, conflict analysis
Exchange staff in context with Road Safety Audit
Teams formed by local agencies outside jurisdiction
Minimum and maximum team sizes required for an audit
Three and five
Diagnose safety problems at a site
Safety data review
Assessment of supporting documentation
Assessment of field conditions
Definition of problem statement
Safety data review stages
Assembling crash data
Conducting descriptive crash statistics
Summarizing crashes by location
Screening proposed countermeasures
Overall Feasibility
Impact on traffic operation
Consistency with local practice
Primary purpose of economic appraisals in safety management process
Identify whether countermeasures have larger benefits then their cost
Common characteristic of lane departure crashes
Occurs during dark hours in rural highway
Most common type of pedestrian crash
Dart out first half
Term defined as expected crash frequency and severity
Substantive safety
System approach in safety analysis
Site-specific geometric attributes
Treating safety issues where crashes are dispersed
Identifies and addresses safety issues
How many principles has FHWA defined for Safe System approach?
6
Type of error in crash data does “typographic’ refer to?
Data entry
Limitation of observed crash data
Data quality and accuracy
Crash reporting threshold
Differences in data collection method
