Online Transportation Safety

1. (20 points) Spell out the following acronyms.
   1) EPDO:
   2) SVROR:
   3) AADT:
   4) FI:
   5) MV:
   6) MVT:
   7) 3ST:
   8) 4SG:
   9) BCR:
   10) NPV:
   CIV 602-Online Transportation Safety Exam 2
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2. (20 points) A rural segment1 is selected for safety review. The crash summary statistics,
   collision diagram, and condition diagram are shown below. Determine the crash patterns
   and identify the appropriate contributing factors.
   Crash Severity Alcohol- and DrugRelated Crashes
   Fatal Injury PDO Related 6%
   6 32% 62% Not Related 94%
   Crash Type Pavement
   Rear-End 0% Dry 68%
   Angle 0% Wet 32%
   Head-On 15%
   Sideswipe 13% Lighting
   Pedestrian 0% Night 23%
   Fixed
   Object 32% Dawn/Dust 26%
   Rollover 40% Day 51%
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3. (30 Points) Countermeasures for application at a signalized intersection have been
   identified. Please perform cost-benefit analysis to determine whether it is economically
   justified. Summary of crash conditions, contributing factors, and select countermeasures
   are listed in Table 1:
   Table 1 of crash conditions, contributing factors, and select countermeasures
   Data Signalized Intersection
   Major/Minor AADT 47,000/8,500
   Annual AADT Increase 5%
   Predominate Collision Types Angle, Read-End
   Crashes by Severity
   Fatal 0%
   Injury 59%
   PDO 41%
   Selected Countermeasure Convert Signalized intersection to a Modern
   Roundabout
   CMFs are listed in Table 14-3 – Using All settings
   Assumptions
   ▪ Calibrated SPF being evaluated as listed in Table 2
   ▪ Table 2. Expected Average Crash Frequency at Intersection 2 WITHOUT Installing
   the Roundabout
   Year in Service Life Nexpected(total)
   1 10.3
   2 10.5
   3 10.5
   4 11.4
   5 11.5
   6 11.5
   7 11.6
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   8 11.7
   9 11.8
   10 11.8
   11 11.8
   12 11.9
   13 11.9
   14 11.9
   15 12.2
   ▪ Societal crash costs associated with crash severities
   ▪ Cost estimate for implementing the countermeasure: $20,000,000
   ▪ Discount rate (minimum rate of return): 2%
   ▪ Estimate of the service life of the countermeasure: 15 years

Sample Solution